Hi David (@phoenix0509)
I have exactly the same problem that you have. I also wear flip flops in the winter.
I take the same meds, but I don't want to get involved with opioids like fentanyl. I'm not sure the standard meds work, but I take them anyway). I'm also consulting with a pain management specialist soon about low dose naltrexone.
I have discovered some tricks, which may help you or others.
Ugg boots and shoes are the most comfortable for me. In fact, I have lined all my other shoes (including flip flops) with shearling. I think the fact that shearling wool holds a lot of air is why they help.
My symptoms vary dramatically from day to day. Who knows why? I'm generally better in the summer and on vacation to warm places.
I'm also better when I'm in a good mood, or distracted. I believe there is a strong psychological element.
When the pain is very bad, I try to calm myself down, and even invite the pain in, so as to at least feel that I have some control over it.
I try to do physical, outdoor things even when the pain is bad. It serves to distract me some, and I feel better with exercise.
I hope some of this helps.
Jeff