Hello I Have A STD Related Question. About A Week

Hello I have a STD related question. About a week ago I had protected sex with one of my friends. After we were done we rubbed our private parts together but that was about it. I also used a fire and ice condom which slightly irritated my genital. A couple days after this, I had another sexual encounter with another girl but this time I didn't use a condom. Four days after having this sexual encounter I started to experience a slight tingling sensation at the head of my penis. It would come and go throughout the day and after I would urine. There isn't really any pain in that area so I'm confused to what it would be. Any help would be greatly. appreciated.