Does anyone know what this might be?

Lauren • Josiah 💙 & baby Amaya due March 8th, 2022.💕

I got off my period on Sunday and me and my fiancé did the do & ever since I’ve been itchy and it burns a little bit when I pee.. yes he did ‘finish’ in me. & I’ve had LOTS of long stringy discharge but I have no smell or any other indications of an infection?? I was well lubricated. And I was reading that maybe you can get a semen allergy even after being with your partner for a while. Idk helppp!!! I’m going to try the apple cider vinegar bath here soon! I can’t use any creams for itching I’m allergic to them!