ok so I know I'm not pregnant because haven't had sex in 3 months and I've had 3 periods since then.

 

but for the past week or so, I've had terrible sharp pains in my uterus, a ubiquitous amount of discharge, and my boobs are sore. I just got over my period a week ago.

 

I thought it may be a UTI but I've been taking the medicine for it and it hasn't seemed to stop. What else could it be?