I'm posting this on Sunday night, on Wednesday morning I had sex then went to school. I didn't pee until multiple hours after that. On Friday afternoon I went pee and felt an intense burning sensation then it went away after I was done peeing. As of today, I have had to pee multiple times and every time I try only a little bit comes out and it burns. I can't talk to my parents or any other adults about this but I'm scared of what it could be. Does anyone know why this is happening? Is it a Uti? If so, is there any medication I can buy at the store and not have to go to the doctor?