I had sexual intercourse for the first time last Friday. Then, Sunday night I went to bathroom and wiped, there was little bit of blood, since I was supposed to start my period that day I thought it was just my period blood. Then I woke up around 3am this morning and had this urge to go to the bathroom, there was no blood on my pad, but when I peed, lots of blood came out and it was so painful to urine. This has been continuing the whole night so this morning I went to doctors and since there was so much blood in my urine, it could not be tested, so the doctor just prescribed me some antibiotics based on my symptoms. I m pretty sure I have some kind of UTI but is the blood coming out okay? Is it coming out because I m on my period? If so, why is it only coming out when I urine?