Eraction Is Slowly Slowly Gone. Lengh!

I Was unprotected S*x with a girl in 8 month ago and she had many partners,, after then 10 days ago some races will showing in my penis, I use candid cream and races will reduce but not fully reduce, than I again go for intercouse, this time I was thinking for safe s*x and I will Wearing condom but I don't know how to wear, and i told the girl for help but she didn't, and than I was forcely wear the condom and tightly hold the penis than suddenly blood leaking my penis foreskin in the races and half of condom blood leak, this is  biggest mistake of my life,not heard any crack or pop sound, after that I again apply candid cream in penis, and than my penis races heal again, but this insident cause big problem in my penis, After that some days my penis eraction little loss aur not getting Maintain like before, and after some week aur month my penis eraction is slowly slowly gone, now my penis is shrink and I don't feel like before, eraction not maintain soft eraction, Decrease penis lengh