Tight Foreskin, Red dots, Swollen Skin and many sexual compl

Hi, I had unprotected sex with my girlfriend which I am very sorry I did. But after this I had very much pain in my right testicle, and it felt like there was a ball into my balls. like, i have 2 testicles and there was sometinh that felt like threads spinned togheter. And after a day this pain passed, but then I went to sleep. When I woke up my foreskin had tightened, became tighter, not too tight but this keept being tighter, then after 2 days my foreskin was totally thigthened , the skin started falling off like a "white mass" and the area inside of my foreskin looked very unclean, and i had small bumps on my penishead.I was really scared, and the bumps kept developing from small bumps, to big bumps, then at some point, it stopped and went back to normal. I tried a "fake p***y" sometime and the same reaction occured. It seems everytime I have sexual contact my right testicle hurt, and my skin start thighening and i feel this incredible scratching and pain. Even If i do it protected now. And the weird thing is when I wank, nothing like this happens! But if I wank very much, it might occur small swollen areas and small red dots on my penis which i hardly can notice. I'm very curious. Please help me!