Did you have some sort of 'cold' or 'flu' crop up? That sort of hung around for a while? That could trigger some auto-immune issues triggering your neuropathies. I know that it did for my situation. That and or the anti-biotics used to knock it out? Cipro or some other 'bad guys'
Between the stressors in your life AND the flu or other virus in you...well, it can set off the equivalant of the 'keystone cops' in your own body!
To be brutally honest? Getting tested again, and likely more times? Well, it may seem redundant? But if #'s of key blood factors get worse then there is indications of 'things getting documentedly worse'. It is pitiful to say that that might be a good sign? Why? Because it points to clearer directions as to what mite be wrong!
Also take into consideration that many of our pain meds...well? Leach out a lot of our needed calcium and other good bone factors.. Happened to me w/the double whammy of an Immune neuropathy and cancer. Mrs D has heaps of almost mind-boggleing advice under the supplements forum and here as well. I too have fractured metatarsals just stepping wrong on pebbles! No kidding! [Some more than once?]
Lastly? Are those knots and bumps simply just bone? W/o muscle tone? That part is far easier to 'feel' but, it doesnt work as well as there's less fat and muscle padding. It IS something we take for granted until we don't have 'IT' anymore! Good luck, get tested more than throughly and get a diagnosis you can live with that gives you at least a couple of answers. You won't get all of them, but some. Hope and hugs - !!!!!'s - j