So I recently my lost my virginty May 9th. Since then I and my boyfriend have had unprotected sex 5x. Our first time, the absolute very first time with a male, for me, I contracted a UTI, I went to the doctor and was treated as well as tested for various STIs and STDs. The second time we had sex just under a month later, I thought I contracted another one but the blood in the urine went away after the second day of having the issue, this time I drank a gallon or so of h2o on top of normal amount. Then all the next 3x, I only had blood in my urine immediately after sex, 1 of these times there was only a 3 to 5 minute penetration. My bf has only pre-ejaculated into me never has he had a full ejaculation. I do not believe in birth control and have not thought about using condoms, I own them but I truly do not believe unprotected sex is the issue here. The first time we had sex and I was diagnosed with a UTI, I didn't see blood in my urine for a whole day afterwards, the last 4x I have seen it immediately after sex all within 30 mins of sex. The second to last time I had sex, I rinsed my area with water immediately after sex, still I had blood in urine. When we have sex I feel my bf's penis pushing against my bladder with each stroke the first time in missionary which was our time that only lasted 10 mins, was extremely painful even when he stroked slowly, so we stopped. Is the blood in my urine immediately after sex due to the force of my bf's penis hitting my bladder? We have tried multiple different positions and everytime no matter what his penis still hits against my bladder and I still have blood in my urine immediately afterwards, and only in the urine immediately after sex. Should I be concerned? Could these be multiple small scale UTIs? None of my urinations have been painful even with the diagnosed UTI. Should I see my doctor? Could my theory of "it's just because his penis is hitting my bladder" be correct? Please Help!!!!