Hi, and welcome.

As a recent member of this forum, and as someone who has gone through a pretty traumatic few weeks, indeed, my whole world has collapsed from where it was just a short while ago. The fact that you have made it this far, over several years, shows what strength you have. I'm sure everyone here has shed tears over their pain and felt the feelings of hopelessness - I know I have. But you will find strength here, and you should find more relief than trying to battle on your own. I would not myself attempt to offer you technical advice as this is all new to me also, but the people here are very knowledgeable and are only too willing to help point you in the right direction. My advice would be, break each of your problems down further, be more specific. What testing have you had done? What kind of pain/tingling/numbness? is it constant? What exactly are your disabilities? and what medications are you taking now, or have you taken in the past. Which specialists have you consulted with and what were their opinions?
For the true experts here to have a clear idea of how to help you, they'll need to know all of that, and probably more. All I can say is, hang in there you're not alone.