I think I'm having a miscarriage, but I'm not sure. My doctor said that I couldn't get pregnant because my uteral wall is too thick so he put me on birth control. I'm now on my first period since I started birth control, but a large sack I think I'm having a miscarriage, but I'm not sure. My doctor said that I couldn't get pregnant because my uteral wall is too thick so he put me on birth control. I'm now on my first period since I started birth control, but a hsrd sack came out about a inch in a half long. Half of it was dark red and the other half a yellowish white. I was cramping so bad I had to go home from work but I always have really bad cramps. I never took a pregnancy test because my doctor said it was impossible cuz I wasn't ovulating but that was about 2 months ago. I also have been really sick and throwing up for the past couple of days. please let me know what you think nothing will be considered TMI.