Had Partially Protected Sex. Early Periods. Want To Know If I Am Pregnant

hi my name is julie :) well i had sex 3 days ago, the condom broke and now i dont know if im pregnant or not, yesterday i got my period 2 weeks and a half weeks earlier than i should, its way more heavier and dosnt look like period it looks more like blood kind of, im not sure if its my cycle changes or if its something else, im getting worried now and i talked to a pharmacist about it and she said if it continues id have to see a gp, id be more than happy to recieve your information on what you think it might be, hopefully its period but im not fully sure, thanks so much if ye reply to me i'd honestly be more than happy :)