Hi Pennbem:

I have had pretty much the same symptoms as you, but I went through the twitching, cramping, weakness, and then on to the pain in about 6 months rather than 15 years. Fortunately for me, the weakness only lasted a brief period of time, not long enough for significant atrophy to appear. Eventually the weakness went away, the twitching and cramping are pretty well controlled with Gabapentin, and the pain has mostly been "manageable". A year and a half later I still have no formal diagnosis, much less any idea what the root cause is.

These things are unfortunately very unpredictable, difficult to diagnose, and difficult to treat. Some times they flare up after some type of physically or mentally stressful event, then calm down again. Hopefully, your neurologist will be able to find a cause and treat it. If not, hopefully it will settle down on it's own. In the meantime, exercise to the extent you can, improve your diet and reduce your stress levels. You may also want to start on some supplements to support nerve health and nerve healing. You can find more info on that in the "supplements" section of the forum.

Hopefully things settle down for you