Curing my son's autism

My son started showing signs of autism at the age of 2 they were very minor so we kind of just ignored the symptoms and signs and moved on with life. He loved doing normall fun adventurous activities, loved to play with other kids and being out doors, was involved in gymnastics and swimming classes. Now it has all stopped! Now he's six, his autism has exploded now he hits his head and thrashed his hands and can't stop doing it, his fits of rage are uncontrollable and sometimes he doesn't even remember what he says or does during them but they have gotten so intense and violent that he wants to break everything he can get his hands. He's created this fear of everything and the world and is completely shut in it and doesn't want to leave the house. He doesn't want to touch the floor or door knobs or handles and fear that is going to die from some disease. Some days he doesn't even want me to touch him. Whatever someone else or I touches of his including himself he licks like a cat to clean it. I fear he will definitely get ill from this habit and nothing even logical explanations of what could happen or what he's doing can get through to him. I have seen such a drastic change in his body and health. It is when you realize that he can't even function or be happy anymore that you know you need to do something. He doesn't even want to play doesn't want to be touched doesn't want to go anywhere or do anything at all he wants to take a 10 to 12 showers a day because the air that touches him is so dirty, in the past 3 weeks it is grown progressively and increasingly worse I must do something ASAP. This is definitely not a life to live I figured everything that is gained got there for a reason so I did my in-depth research and reading and I have actually found many many cases were autism can actually be reversed and cured. This takes of drastic life change you have to go through a very rigorous delicate detox and completely revamp your entire lifestyle including all chemicals and pesticides Soaps & detergents as well as diet has to change. We also have several specialist doctors that are costing a pretty penny, one doctor alone out-of-pocket cost was $450 that was a third of our paycheck. No cost is too great to cure my son and give him a possible future. But I need help I desperately need help it is with great sadness that I cannot afford this new road very easily so I'm asking anything I am several months behind on our mortgage and our car payment I cannot lose those but then also lose in this battle to cure my son. Please help!!!