Is the blood in urine periods or something else?

Hello doctor,

I am 18 years old female and sexually not active. A month back, I woke up and peed straight up blood. I went to the ER and was diagnosed a bladder infection or UTI. I was prescribed Bactrim and the next day woke up with a rash. It turns out I was allergic. So, the next day I started a new medicine and took it for a few days. The blood stopped, but I felt pain, so I went back to the ER. They told me my UTI was gone and to stop taking the medicine. A few days later, I saw blood when I wiped after peeing, but it looks like it was in my discharge. It went on a few times, and I went back to the ER three days ago and said that I was peeing blood again. So, I am worried. I have not gotten my period this month, and no, I am not pregnant. I am a virgin. They said it was not a UTI and I was fine. I have had no pain or anything. Just now I peed and when I wiped there was blood in my discharge. It is not a lot but still freaks me out. I cannot tell if it is my period or something else. I have never had this happen before. My mother said that it is spotting but makes no sense to me.

Thank you.