Okay, so I'm 43 days late on my period and I'm NOT pregnant. I've taken about 6 home pregnancy test and 2 blood pregnancy test and they've all turned out to be negative. My doctor prescribed micronized progesterone 200 mg for 5 days (substituted for Prometrium). I've taken all of the medicine and I still haven't started my period. I'm having lower back pain, abdominal pain, stomach cramps, and I'm also bloated. I keep thinking that my period is about to start because of the lower back pain and stomach pain. Has anyone else had this problem before? This is very stressful!

*note: I do have endometriosis and my cycles are always regular*