Have him suck on the other one so they even out
If you feel weird about it, then it means you are too young to be doing that activity. It might be better to slow down. There is not good reason to have sex, especially when it doesn't feel right. Good luck.
its not that big a deal, just second ba<x>se.
If he sucked too hard and made a hickey or a bruise it could be sore for a while.
Maybe you weren't ready to go that far.
Youthful indiscretions happen, but think about why this didn't feel right before you go further.
welcome to the club :))
You'll be fine, breasts are gonna feel weird after a good sucking.
Your supposed to suck him in return. This is an unwelcome dishonor you've visited upon him. Most unwelcome.