It sounds like you have lichen planus in your mouth as well as your esophagus. I am so sorry, it sounds painful and unpleasant. I have it just in my esophagus and on my left calf. I too lost weight - over 100 lbs before it was diagnosed. I was heavy to start with so I was lucky that the weight loss didn't become a health issue. I too have used MJ to help me eat - specifically, CBD oil which goes under my tongue. It does seem to help!