You sat in a puddle of your own blood
Part of it was dry and some of it was still wet?
You took in deep, slow and steadily breaths in and out.
You couldn't tell how long you've been left here alone suffering in pain
All you could think about was Dad's
Last words to you before doing the unthinkable.
I'm so sorry...please forgive me....
And now you didn't know how you should feel.
Sorrow
Anger
Fright
It was just a mix of the three
First, you were in a sad state to have
This happen to you and think of the internal pain dad was having.
Second, You were mad,
If dad was hurting why did he bring me here to kill me? Did i do something to make him decide to do this?
Third,ugh!
You heard a loud grumble at your stomach of course you then just quietly groan
And now you were hungry and slightly parched (thirsty).
Well here's one thing, with the time you've been left here, it was long enough for you to get hungry. Great!
Anyway...
You lay your head back while your legs are just stretched out on the dirty,cold, floor.

Breathe in Breathe out...

...time skip....
You had drifted off to sleep.
Finally. But you were maybe in a half sleep?
So you were still aware of your surroundings. Like, a wall of rusty metal bars that were too big to keep people in or out.
Yeah... Ok (sorry a little off topic)
You were asleep....

Just then you heard a CREEEEAK!
At the door and suddenly you felt cold and suffocating air almost immediately after the door opens.
And as the door opens enough to let a person in, it was slammed shut.
The sound startled you and made you jump a little.

Then, you heard the sound of slow foot steps walk torwards you.
And now you didn't know what to do
Ask "who's there?" or just stay silent.
Since you couldn't really fight back (even though you had sans's power to summon gaster blasters but ok you didn't know about that for some reason)
Then you ask "who's there?"
No response.
You try to scramble to your feet but you just slipped and fell.
Now you were more frightened than ever.
"Please don't hurt me again." you pleaded
Then it stopped you heard the person bend down to your level.
Tears (don't question it) start rolling down your cheeks frightened for what this person was planning to do to you.
"Please..."

"Shh...don't be afraid."
It was a calm voice but in a familar tone.
You were still crying a little, but you managed to croak a few more words out
"D-dad?"
They were silent.

Then they spoke

"He is long gone... And i don't have much time either."

"Papyrus?" you ask.
To be continued...