I am young, a 19 year old female who s sexually active. My boyfriend positively isn t involved with anyone else. I ve never had a UTI before but recently got one about 2 weeks ago. I saw a doctor for it, but he prescribed me birth control instead. Well I drank a bunch of water to get rid of the bacteria in my system and in a couple of days, I didn t have the burning sensation when I peed. However, lately, there s been sort of dandruffy looking things (I m not sure how to describe them) in my urine recently and I m not sure what it could be.