I'm a 24 year old male who recently, about 4 days ago, received my first blow job ever. I only received, I was not expecting it and completely caught me off guard. She said she was disease free and gets checked every three months or so but I don't know her well and Im freaking out. I haven't shown any signs yet but reading google has made me very nervous. Should I be worried about HIV? STD? I did start to have a tingling feeling in the tip of my penis but I read that it could be "genitally focused anxiety"? I could really use a professional opinion to help me understand it more. When is the soonest I can get checked?