Why is my urine full of blood

Because something is wrong with you. Go to the doctor.

It could be any number of things. A doctor would be the best person to ask. Make an appointment to see one asap.

Blood in the urine can be some serous issues, please get to a doctor

There are trace amounts of blood in anyone's urine, only seen by testing. Have you actually seen your urine bloody, or were you just tested for a bladder/kidney problem and your doctor mentioned 'blood in urine'?