16 year old daughter suffering

My 16 year old daughter has been having a lot of severe stomach aches and loose stools mixed with some blood and mucus. The blood though we determined was coming from a hemorrhoid because of the frequency to times she is going. For at least 5 months now she has had a sed rate above 30. She is often extremely hungry and then eats two or three bites and is full and nauseous. She had a colonoscopy and they found nothing. THey thought it may be PID so we went to an ObGyn...nothing. I am wondering what the symptoms could mean and also if she is seeing the right type of doctors. Any information about the types of things I should talk to her Pediatrician, Gastroenterologist, and her ObGyn about.

[Eljoy18]

Hi, I'm not any kind of expert or anything but why don't you ask them for endoscopyduodenoscopy and/or upper GI series with barium.? Hope all is well and good luck. Ellen