Pcos, metformin, no AF

Hi, I've been on metformin for close to 2 months now. I'm taking 1500 mg per day. My last cycle started Jan. 27th, I've had countless BFN, and my dr had me do a 7 day course of provera to induce cycle. I still have not had a cycle. I'm waiting a call back from the dr but I wanted to see if any of you ladies had a regular cycle but not ovulating before metformin then after starting it you became irregular. That is my issue, I had 33 day cycles before just not ovulating now I'm a mess.