Mucus in stools as well as other odd symptoms

For a couple months i have hand both clear and green mucus in my stools, one of the more stranger symptoms is that my stools are steaming (or what looks like steam). I have been to 2 gastroenterologists and my pediatrician (im 13). I have had both a colonoscopy and an endoscopy as well as various bloods test. I don't know whats going on and I need some help. When I told the doctors about the 'steaming stools' they didn't believe me. There are no chemicals in the toilet bowl and the water is fairly warm. Someone please help!