Klo - i'm not sure that it may be, but I get those same pains, and no one has been able to tell me other than one silly doctor who said it was just "ovulation pain", but this happens to me well after ovulation time.
If it's really bad, or doesn't go away, go to your doctor.
Maybe they are early symptoms of a bad af coming???
I hope you feel better!!! Keep us posted!
Good luck