Around Nov. 2010, I had sex with a girl, who bit me during oral sex & ever since then, I’ve had problems. My penis size has decreased (I was 5.2-6.2 inches long before any of this has happened) now I am 4-4.5 inches. Sometimes my penis skin feels tight like it can't go longer, but I'm circumcised. Before any of this happened, I’d have delayed ejaculation, but now I have premature ejaculation, & I'm having difficulty getting & maintaining erections.