I discovered a hard lump in my rectum about an inch and half or so up 3 months ago. It felt like what I imagine a tumor would feel like. I checked again a few days after i discovered it and it wasn't there. Then a few days later it was there but felt different. I had a rectal exam and the doctor didn't find anything and said I was fine. There were streaks of blood on my toilet paper for about 2 weeks after i discovered it and there hasn't been any blood since then. It sometimes feels like there is something up there and typically itches after i poop. Plz help. (16)(M)