ADVICE ASAP!

Okay so Ik I’m young but I’m 17... and me and my girlfriend did things .. and she fingered me.. and she DIDNT wash her hands before doing it ... and I’m so scared because it burns when I pee ... and it hurts like cramps now ... and I’m a germaphobe... and I’m just so scared . Please advice ? Am I gonna have some typa disease , infection? Idk . Will drinking a specific thing help me .