so let's play what happened when:
when i was peeing with pain and had blood in my urine, luckily the next day was a weekday and i could go to the school health clinic, and got diagnosed with a UTI. i got pills to take for a week, and felt instantly better the next day. believe me, if you don't get it checked, it will hurt EACH time you pee, causing you to stop the stream, but because you didn't finish peeing you just need to pee again twenty minutes again, causing the pain to continue.
my roommate my third year had a UTI, and it spread to her kidneys. she became sick all the time, was always tired, and was on constant meds. it sucked.
get it checked out if you can. look up a clinic nearby if you don't want to go to the ER.