I had unprottected sex about 24 hours ago, I then masturbated about an hour after sex, since I woke up my penis looked normal but when I pulled back the foreskin it s all very red, itchy, swollen, sore and when not pulling back the foreskin and it s just sat back, there a ridges/bumps been formed where pus is being produced, when the foreskin is pulled back it is all wet and is very irritating, I need to know what it is because it s playing on my mind, help please