Had sex, jan 8 & 11, on the 12 started my period for two weeks striaght. can i be pregnant? im 4 days late for this months period.

Sounds like, no: If you only had sex on 1/8 and 1/11, and then you had a 2 week period and you haven't had sex since, then the likelihood that you're pregnant is close to zero. But if you're ever late for a period, then take a home pregnancy tests. If you are pregnant, they can be positive as soon as 5 days before your missed period. If test is negative, then likely period will come any day.