Rheumatologist for arthritis, neurologist for neuropathy, pain management for pain, and your primary care doctor should be able to give you something for sleep.

Best wishes to you for some relief soon.
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Sorry about all that pain Margaret but how do you know those are your issues if you don't have a doctor? It could even be something else causing the worst symptoms and you are mixing a lot of OTC meds although I get that pain will make you do that for sure! Usually you would start with your primary care doctor who could refer you to the appropriate specialist or specialists. If you are diabetic I'm assuming you must have a doctor. If your doctor is not trying to help you then shame on them and start by finding another primary care doctor who will guide you.

I’m so sorry you are having such a hard time. Pain is not our friend. I also suffer with awful pain from several different maladies.
I go to a RHEUMATOLOGIST for arthritic pain and pain from an autoimmune disease that I have, and fibromyalgia
I see a NEUROLOGIST for my peripheral neuropathy
and occipital neuralgia both of which are very painful.

Because I’m on a blood thinner I can only take Tylenol.

I hope you start feeling better soon.