bleeding between periods while on birth control?

Hello all. I used to have crazy pain, nausea, vomiting, and bleeding during ovulation, approx. 2 weeks after each period ended. My doctor put me on birth control pills a while back and it stopped most of the pain but lately (last month and this month) I am starting to have pain again during when I would be ovulating even though I know I'm not because of the BC pills. It is not as painful as it used to be but I am still having spotting and cramps and no appetite (some nausea)
I went to my OB/GYN last week and she said it was normal but I am wondering if it is common to have pain and bleeding between periods while on the pill. Why do I feel like I'm ovulating if I'm not? Thanks