Why Am I Discharging Brown Mucus After Rough Sex?

i had my period about 3 weeks ago and it lasted like a week and a half after it ended i had some pretty rough sex i think it messed my cervix up cuz ever since then i been bleeding or discharging brown mucus , im really worried, could i be pregnant or is it just an infection? i have no medical right now so once it gets back on ill go get this checked but for now im just asking. please help me.??