One morning you had woken up in pain and you knew that you had your period.

You quickly got a pad/tampon on/in and you took some aspirin so that you wouldn't be in too much pain.

Since both of your moms were out for the day and your younger brother was at his friend's house you would be going to the Autobot base.

When you saw Ratchet you grabbed a couple of pieces of your favorite candy and went to his alt mode, unfortunately your aspirin hadn't taken full effect yet, which meant that you were still in a little pain.

"Y/n, are you feeling alright?" Ratchet asked you as his holoform appeared in the driver's seat of his alt mode.

"Y-yeah, I'm just on my period." You said.

"Is.....is there anything you need?" Ratchet asked you hesitantly.

"No, my aspirin should take effect soon." You replied as you felt your cramps start to go away.

You were surprised that Ratchet didn't panic as soon as you told him that you were on your period, but you were thankful that he was a little less grumpy around you.