I'm 20 years old and my boyfriend and I do not use protection. I had my period end of January-beginning of February and than had unprotected sexual on February 7th. Than a week later I started spotting. Started out light and got heavy fast. And it lasted about a week. So I called my doctor and they had me take a pregnancy test and it was negative. The doctors just said it could be anything and they weren't sure. So than the whole ending month of February I've been extremely tired. Like sleeping forever and when I'm awake I can barely keep my eyes open. And my breasts have been sore. And slight cramping. On Saturday after morning sex I went to the bathroom and saw just a light spot of brown/pink spotting. And than Sunday it was a little spotting again. And today it was heavier when I went to the bathroom when I woke up. And I have cramps. But again, I'm extremely tired. Can barely keep my eyes open. Is there anyway I could be pregnant and just bleeding also? PLEASE HELP.