my boyfriend and i had unprotected sex a couple of times and after that my period was 2 weeks late and only lasted 3 days when my menstrual is usually 6 days long, i slept a lot, and i was vomiting for awhile but then i got my period this month again too but this one was 2 weeks early and it was 3 days then it stopped for a whole day then came back that next day.. so what i wanna know is can i still be pregnant?