I had unprotected about 5 months ago and since then, have had my period regularly every month. However, this month I have not had my period and it is over 2 weeks late. I have taken several home pregnancy tests and they were all negative, however I have heard of people who have had negatives and still were pregnant, and of people who bleed heavily like a period during a lot of their pregnancy. I am worried that I could somehow be pregnant.