Invisalign Burning mouth Syndrome

I started Invisalign From march 1st, from the second day I was getting very dry mouth and burning sensation in my tongue, then upper roof of mouth. I thought it's normal and kept wearing it for 20-22hrs a day, then after 10 days put the 2nd tray but symptoms didn't go away, and the BIGGEST PROBLEM is I couldn't sleep well! I sleep 2-3 hrs then I wake up feeling the burn and mouth too dry. I tried removing the upper tray before I sleep but started coughing in the middle of the night, so I removed both trays before sleeping and still got up at night. Went to the Ortho after the 20 days of first 2 trays, he said try Biotene, and put me attachments and 3rd tray. I put the 3rd trays for 3 days only and completely stopped wearing it after 4th day. My life was affected my job, I was feeling like a zombie all day from bad sleep. I had appt with Ortho again, after 5 days and after I contacted Invisalign, and he said it could be allergy, and he saw only 1 case like that from 2000 cases he did. He took the attachments out and advised clear braces. I said I'll think about it. Problem is now it has been 7 days since I stopped wearing the trays and I still have the burning tongue tip and upper mouth roof, when I sleep they swell and get worse and I wake up many times feeling the burn and dry mouth. I kept Googling it and it is very similar symptoms to the Burning Mouth Syndrome ! I M freaking out now as it has no cure!! What should I do ?