for the past few days, my penis has been really really sore. As a gay man, I haven't really been sexually active latley but my last encounter was oral sex about 4 days ago. Now it hurts before and after masterbation. What it gets erect it hurts as well. The tip only hurts when I urinate. But it hurts everywhere else otherwise (and not at the tip). Its the feeling that men have when they've masterbated too many times in one day, only for me it hurts before I even do it once. Is this possibily an STD from oral sex? I'm 21 years old and you can imagine im a bit worried!!

Any suggestions, comments, or ideas ??? Pleeeeease Help!