That happened to me not too long ago- but I'm gonna go to bed, gn ^^ I hope you feel better :D

By your armpitts Or on like your upper ribcage

https://paste.pics/JMWSH

I get those a lot You just gotta breathe through em, take long deep breaths, even if it hurts and hold it for a while. It normally goes away in a few minutes, depending on how bad it hurts.