Hi Me And My Guy Bestfriend Had Unprotected Sex A

Hi me and my guy bestfriend had unprotected sex a week ago, since than i have a itchy vagina, my discharge is clear but has white lumps or a yellowy white colour. I really dont wanna be pregant and disappoint my parents, my period isnt due until the 28th, and all this had me stressed out and i cant focus at school or anywhere. In desperate help :(