Hi, My Husband And I Are Trying To Have A

Hi, my husband and I are trying to have a baby. I have been on Clomid and I just took medroxyprogesterone for 10 day. I have already completed the 10 day treatment and I have reached my week but I still have not started my cycle. I am on day 45. I have taken pregnancy test and they are all negative. I have had cramping, felt tired, tenderness to my nipples and the past few days my back has hurt so bad that I can't hardly move... Is this common. I did call my doc and I am waiting on a call.
Can Someone please give me some answers.