My husband and I have be Trying to conceive for a little over a year now. I did 6 rounds of clomid starting in June of 2012 along with progestrone. I stopped taking everything in Dec. 2012. My cycle with progestrone was 28-29 days and without is ranges from 22-25 days which is normal for me. This month my cycle was 33 days and I had severe heartburn and nasea for 2 weeks leading up to my period which arrived after intercourse. This has never happened before. I took a pregnancy test yesterday (4-21) and it was negative. What in the world could have made me that sick and my period be so late? Could I be pregnant?