What Causes Heavy Brown Bleeding After Taking Clomid And Provera?

Hello doctors. I am 29 years old. My husband and I are hoping to have a baby. My OB gave me Clomid for ovulation, Provera to regulate my cycle, and Folic Acid. I did ovulate as the scan showed. We made contact on the days that I am fertile (May 14-21). I don't have regular cycle, but it usually range from 30-39 days. And I bleed heavily when I have my menstruation which usually lasts 5-6 days. I only have brown discharge at the beginning of my menstruation then becomes red as it gets heavier. On my 34th day, I had my menstruation, however, it was not as heavy as it used to be. It First day was brown with a little hint of red. But instead of getting heavier, it became lighter. what comes out is mostly brown blood. Normally, my blood would really fill my napkin on the 1st-2nd day, but it barely filled my napkin, and that's first day! The only weird feelings I have are heaviness in my head but I presumed this was due to work, I breathe heavily when I walk fast, and upset tummy. There were times I wanted to vomit in the middle of the night. I took PT on my 37th day, it came negative. My questions are: Are these side effects of the medicines I took (Clomid and Provera)? Am I having implantation bleeding, or just a normal cleansing of the old blood? Thank you so much for sharing your knowledge to me.