:C what's a girl to do
Gender of your choosing of course.
I can't tell if I actually fucked it up or if it's just sore from not having been to the gym in such a long time. My chest, abs, and legs are sore too but not as much as my back. If I had fucked it up, I would've been able to tell right away as soon as I left the gym, wouldn't I?
If it's an ache that usually means it's just sore from being worked. If there is a sharp pain when moving a certain way then you may have pulled a muscle.