UTI or something more??

jas
i had unprotected sex two days ago (june 24th) and yesterday i went to the beach, and left my wet bathing suit on all day which i know is a no-no but i had no choice :/ this morning when i went to pee i had pain in my clitoris, not burning but more like sharp and pressure. it happened the next time i peed too. after i pee, it feels like i'm not done even though i am. i know that's a symptom of a UTI but i'm really scared of chlamydia and other stds :(