I have no idea if it would help at all but I take medication for restless leg syndrome that is actually anti-seizure, something totally unrelated called Carbidopa/Levodopa 25-100MG. Sometimes I have to take it late in the afternoons as well, my doctor has written the prescription to include the quantity to enable me to take it then. I don't and never have had seizures. Just an idea for something that might being you interim relief until you can get a permanent solution. I have problems with the top two vertebrae, Atlas, inside the base of my head and get them adjusted by an Atlas Chiropractor every 3-4 weeks.
My neurologist also has prescribed Gabapentin for pins and needles feelings I had in my feet and ankles and it also helped the zaps that I ran down the calves in my legs sometimes. I have neuropathy, numbness in both of my feet and it doesn't help with that
I have fibromyalgia that is in the mix here everywhere so I am not suggesting that you have any of the problems that I have. I'm suggesting that the medications that I'm taking for issues relating to leg pains, cramping, pins & needles and zapping feelings might help you as they are not specific for my condition rather are for other medical problems but just happen to help my problems as well.
I hate the cocktail of medications I take but I also like to be able to sleep and walk.
One last thought. Vitamin D fights inflammation and my nutritionist said to just be in the normal range of 40 isn't optimal. My Internist put me on a round of mega doses a few years ago of 100,000 for a couple of times etc. I am now taking 5,000 to 10,000 IU daily along with my first dose of Super Omega-3 in the mornings. It is important to take D at a different time of day than your multiple and other supplemental vitamins. The last reading my level was up to 62 and I'm shooting for over 80. Dr. Oz recommends everyone take 1,000 IU a day. I'm in GERD medications which is another reason why I need to take it and B12.
I hope something in here helps. I'd just ask your doctor for medication to treat the symptoms at this point. When we can't treat the cause this is all we can do.......the story of my life it seems.