Hi! Oh the joy of the trying to conceive journey!! Been there. It can be confusing and my advice is to try to have fun with it. Anyway, I'd say that if you have been on provera before and didn't have this side effect, it is likely not that. Other possibilities are that it is unrelated and is gastrointestinal in nature. OR, you could have a simple cyst in your ovary. This is pretty common and most women will get one at some point. They usually pass on their own but cause symptoms like you describe. When was your last period? Normally, you can test for pregnancy 2.5 weeks after your the sex you wonder if made you pregnant. So, you are getting closer to that.
Did you get a chance to check with your doctor about this? How long have you been TTC?