Recently I started having sex with this girl i know well, we were just messing sround snd it just happened. Im 21 years old and she is 19 but i didnt have a condom, she stuck it in her and i pulled out almost immediately. Excuse my language but the reason why i did was because her p***y juice i would say burned the tip of my urethra. It didnt burn any time after that and i urinate fine. She said she didnt have anything and i know i dont. What could it be and should I be worried?