Autoimmune Diseases Dental Work!!

This is very hard for me to do, to ask for any kind of help and sitting here typing this I am crying.  I have 9 diseases and one of the main ones is destroying the inside of my mouth effecting my gums and teeth.  My health medical plan that is Blue Cross won't pay under medical even though my Dr at USC has tried and we have gone through all the appeals.  I went to USC school of dentistry today to try and get into their low cost program but because of my medical conditions they don't have any openings for new patients under special needs until next yr.  I can't wait that long as I am in pain and the infection in my mouth is getting worse and could kill me.  My dental insurance which is an HMO plan hardly pays anything and I am on disability and don't get much money each month with Social Sec.  So, here I am at this place, time and point in my life where I don't know what to do but ask for your help and anything will help.  I have an appointment next week to start my extensive treatment plan.  I never would have thought my life would turn out this way and being so sick has taken a toll on my whole life.  I have always been the one to help others and now I need your help.  Thank you & God Bless.