I was sitting down on the toilet going number 2. I had to pee but i had to sit and hold it in an ackward position do to the space. When I released the urine i felt a sharp pain and then noticed that I was peeing a liitle blood, it has been about 10min and i can still see blood coming out of my penis in small amounts. I dont have any STDs and this has never happened before. what should I do.