hello i'm a 16 year old girl. just the other week i've been getting a weird kind of pain on my pelvis. it doesn't hurt really bad it just bugs. sometimes i get pain on my lower back too. i've also been urinating frequently too. it doesn't burn or hurt when i pee. i don't know what this is and i haven't gone to the doctor yet, but i wanted to see if you guys have any idea what this might be. thanks.