(A/N): please leave feedback, I need to know what to do, and what to fix. Also what I'm doing wrong. Even if it's negative, I want the truth. Thanks.

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The rest of the day was pretty normal. Peter and I just sat in the living room, watching tv. Soon it was time for our training with Nat, so I got my workout clothes back on.

I walked into the gym, yes we had a gym in Stark tower, seeing Peter sparring with Natasha.

"Hey guys," I said as I put my water bottle down.

"Hi, Y/N, how are you feeling?" Natasha said while easily pinning Peter, and sitting on his back.

I laughed and said, "Fine, actually. I feel really energetic, I don't know why."

Peter and Natasha looked at eachother, then quickly looked away.

"What?" I asked.

"Nothing," Nat smiled. "Ok you two, lets run laps."

Peter and I were told to run til we drop. We had done 13 laps, and I wasn't breaking a sweat. I could tell Peter was struggling though.

"Alright, I'm done," He said, after one more lap. "Really getting into shape there, huh Stark?"

I stopped running, I felt weird. My heard hurt, I couldn't see straight. Everything was blurry, and I felt like falling asleep. I couldn't feel most of my body. It was all numb.

"Y/N?" Peter put his hand on my shoulder.

Natasha came over too, asking if I was alright.

I saw her mouth open, at least I think. I couldn't hear anything, the ringing was back.

-Peter's POV-

"Y/N?" I asked. She seemed a bit off. She was looking around, as if she was lost, or scared.

Her eyes were glassy, and she wouldn't respond.

"Y/N?" I asked her again.

Nat came over as well.

"Y/N, are you ok?" She asked her.

"I-I-" she said as she fell to the floor.

-Your POV-

I started to get dizzy, and my head was spinning. I felt someone put their hands on my shoulders, but they grimaced at the touch of my skin.

"She's burning up," Peter said, wincing.

"What the hell," Nat muttered. She said it really quietly, so I'm not sure how I heard.

"Friday, we need immediate medical attention, now," Peter demanded. "And get Mr. Stark down here."

"Of course, Mr. Parker."

That's the last thing I remember as I passed out.

-Peter's POV-

Y/N fell to the ground, but thank God, I caught her. She would've hit her head pretty hard.

Here I was again, carrying med Y/N to the infirmary.

The nurse or doctor, whoever it was, wasn't able to leave the medical floor with a stretcher, which was odd.

If you're working for Tony-freaking-Stark, then shouldn't there be better service?

We got Y/N settled in, as Dr. Banner, the only reliable person in the building, ran some tests on her. He said they all came back clean, but I'm sure he was missing something. There had to be a reason for all this weird stuff that was happening to her, right?

"Blood sugar, vitals, and white blood cell count are all normal," He explained. "I'm not sure what's going on, or how to fix it."

"Well, you've got to be missing something. Try again," Mr. Stark said coldly.

All the avengers were gathered in a conference room, discussing the situation while Natasha was upstairs with Y/N.

"How does the machine work? Properly," I asked Mr. Stark.

"It's supposed to let people go days without sleep, and not feel tired."

"Yeah, I know, but like what does it do? Specifically."

He then went into complex detail, and not many people understood. I did, luckily. Biology and chemistry were some of my best classes.

I sat down and thought in silence for a while.

What could be happening to her? When I got powers, my DNA changed.

"What's in the serum and gases?" I asked.

Tony listed the ingredients, and I noticed I had heard of some of them before. I knew they had been used on someone, but who?

I put my head in my hands for a couple minutes, my mind racing.

I stood up, realizing something.

"Super soldier serum," I said. "That's it. Some of the ingredients are the same, and some of the side effects. What if you just turned your daughter into another Captain America?"

Everyone looked at me in awe.

"Kid could be right," Cap said. We need to check her brain activity,"

"On it," Bruce called, running out of the room.

"I hope you're right, underoos," Tony said as he passed me, following Bruce.

~~~

It had been 2 hours since Y/N was out, but she had just woken up.

I went to go see her as soon as I heard.

"Y/N," I smiled as I rushed through the door towards her.

"Peter. Hey!" She smiled and I gave her a hug.

I put one hand on her waist, and the other on her head. I pulled back a bit, gazing into her eyes. I leant my head down and I softly kissed her forehead.

"How're you feeling?"

"Tired. But I'm better now, you know? I'm ok."

"Good."

~~~

I wish that's how it went.

"Y/N," I said, running through the door. "I came as soon as I heard."

I eyed her, skeptical. She looked at me, forcing a smile. I could tell she was faking it. She looked awake, and really alert.

I expected her to be more tired, and drained out. Maybe pale, even.

I walked over, and bent down to give her a hug.

She threw me over the bed, to the opposite side I was just on. I hit the floor with a thud, landing on my back. Next thing I knew, she was on top of me, holding my arms down.

I stared at her, her face was only inches from mine.

"Good to see you too?" I laughed nervously.

Y/N seemed to snap back to reality.

"S-sorry," she got off of me, and stood by the bed.

"Are you ok?" I questioned.

Y/N opened her mouth, it looked like she was going to say yes, but closed it quickly and sighed. "No, no I'm not," she answered, a tear rolling down her cheek.

I stepped forward, cautiously. She didn't react, she just looked at me.

She hugged me, sobbing into my shirt.

"I don't know what's happening to me, Peter," she cried.

"It's ok, we're gonna figure it out," I responded, trying to comfort her.

"Maybe," She said.

"Hey," I pulled back, grabbing her hands. "We will, ok? I promise."

She didn't seem to believe me. And honestly, I couldn't blame her. Who knows how long it'll take to figure out what's 'wrong' with her.

(A/N): thanks for reading, hope you enjoy. Leave comments and vote if you want.