I got my period a week after loosing my virginity and it's still not over 2 weeks later (usually is 6 days)what are the causes?

SEE A GYN: Need to make sure u have no cuts tears or ulcers that are bleeding or cervix problems and an ultrasound of the uterus should be done if u have non of those and a pap and cultures.

Probably unrelated : A very long period can be due to a lot of things. If your periods are irregular (skip > 6 weeks between periods) they can be heavier; thyroid problems can cause heavier/longer periods; sometimes ovarian cysts can disrupt normal menstrual cycles. Patients who are overweight tend to have heavier &/or longer periods. But it could be due to a pregnancy - and that needs to be checked for.