After having rough sex over the weekend i have my period again, is that normal? could i be pregnant? std?

Difficult: Menstrual irregularities can be precipitated by many different things. Is it your period, or are you bleeding from trauma of 'rough sex'? Yes, you could be pregnant - easy to tell by urine test strip in 7-10 days and repeat if necessary. Stds always possible and strongly suggest you go and get checked, and make sure they include HIV and syphilis, along with gonorrhea, chlamydia and others.