I had unprotected sex with my fiancé 3 days before my period, when I did start my period, it only lasted 2 days. That never has happened to me. It started heavy the first day and the second day it got light then eventually stopped. I'm not sure if I could be pregnant, or if this is normal?

Yes, this is normal and yes you could be pregnant. Honestly it can bet either. Just no way to tell at this early date. Just going to have to wait it out till next month, if you miss that period, then wait about 10 days and do a pregnancy test, with first urine of the morning

Thank you very much. I'm just really concerned.