Hi, I Had (unprotected) Oral Sex Two Weeks Ago. About

Hi, I had (unprotected) oral sex two weeks ago. About a week after that, I noticed that the opening of my penis got a bit itchy but a day before that happened, I had masturbated more than five times. I haven't stopped masturbating since but it's still itchy.
I don't feel any burning sensation when I urinate, I have not smelly discharge.
Help! I'm really paranoid.