Me and my boyfriend of half a year had anal sex around two weeks ago. In the heat of the moment, he didn't clean himself of before switching back to vaginal sex. Two days after, it started burning when I peed and has been fluctuating in pain since then. I knows I'm going to get the response "go to the doctor" but I want to see if I can fix this by myself first. I have been drinking lots of water but thats all I've been doing to fix it. What else can I do and is it even possible to get rid of it by myself?