My period started on January 19th I had unprotected sex at the end of my period. I also had unprotected sex on the 14th day of my menstrual cycle and also a couple of times towards the end. My breast were very sensitive and I had quiet a bit of cramping off and on throughout the beginning of February and about the week before my period started. My period was due on the 15th of February but it started about 11 oclock on the 16th. My period usually lasts about 6 days but I have only had it about 2 days and it is very light and only brown colored which is not at all normal. I have taken 3 pregnancy test but they come back negative. The last one I took was today. I am on the end of my period only 2 days into it. What do you think?

Stop having unprotected sex unless you're trying to have a baby.

Home pregnancy tests don't always work. Go to the doctor and cough up $25 to find out for sure.

The tests that they administer at the doctors offices are the same tests you buy at the store (short of getting a blood test) Likely it was just an irregular period. However, it is possible that it was early pregnancy bleeding. I would wait one week, then get a qualatative blood test done at your local hospital. (typically about $10)