I am a 17 year old female and I have been on my period for about 2-3 weeks now. My flow varies between heavy, normal, and light/spottting day by day. I have had unprotected sex about four times with my boyfriend since I have been on my period. Why am I still bleeding after my period should have already stopped? Could I be pregnant or what?

Time to see your doctor. Bleeding for 3 weeks is not a sign of pregnancy, but it is a sign that something is going on, and that needs to be checked.

Of course, any time you have sex pregnancy is possible, but excessive bleeding is not a sign that you are.

See your doctor.