I'd go see another Doctor for sure. Mostly blood coming out isn't normal. Just get it checked out and a 2nd opinion to be safe.
I don't have any pain when going to the restroom. I don't believe it is fissure or hemmroids as I went to see the doctor and asked him and he told me that it wasn't the case.
Mostly blood comes out. I don't have constipation either.
Do you have any pain or discomfort when going to the restroom? If so it could be an anal fissure or hemmroids.
How much blood?
Do you sit for long periods of time? Have constipation?
It could be something minor or something more serious, I'd get it checked by a Doctor just to be safe.