My Daughter Is Extremely Ill. For A Year . She's

My daughter is extremely ill. For a year . She's in pain and vomits .lost over 120lbs. She says she smokes pot to stop her pain and help her eat food. Dr.s think it's pot related. But it could be serious as pancreatic cancer. No dr. Will do much for her. She is only 20 and she is skinny and looks awful. Her pain sends her to the hospital, they treat her for pain. And say they can't find anything. I wonder if she has pancreatic cancer