Today I had to go to the bathroom to pee really bad, but when I went to pee, it was like it discharged back into myself creating ALOT of pain! I then peed, but then there were drops of blood . It s been a couple of hours and I peed again, stung a little and when it first came out, my pee was a little cloudy and pink, but it changed yellow quickly. What happened? Do I need to be worried?