On December 21st, 2010 I had an irregular period. It lasted only 3 days and was very light. Not normal for me. Then on January 4th, 2011 I had another period. It was very normal. I have had re-occurring ovarian cyst. Therefore, I only have one ovary. I did have unprotected sex on January 18th. Now I am experiencing gas, bloating, nausea, heartburn, and fatigue. I've taken 3 pregnancy test, all negative. Not sure what else this maybe. I also have a history of low hcG levels. All four of my prior pregnancies were high risk. And only two were live births. So there is a fear of miscarriage. Can you help?