Help idk if I have a std

I have a question I had unprotected sex and i was fine and i had got my period and then my period stopped and all of a sudden i had this snot like discharge and i dont know if i got something or is it just my body.

take a pregnancy test, sometimes a period can be mistaken with spotting and mucus like discharge sounds like pregnancy discharge (unless you mean it was green, then that is probably an infection)!!

thank you for your reply i needed it alot but its more im trying to figure out after my period was over thats when i had started to get that wet snot like discharge and it was so much it fealt like pee and my lower pelvic was hurting for 2 days and i drink alot of water but me pee is looking a little bit of a dark yellow and im scard right now because im young and it was my first time and sometimes it feels like my viagina itchs but it does not burn when i pee.

you might want to read about bacterial vaginosis, i hope you are ok though!