I'm assuming your on paracides and that they are the cause of the strange sensations.
I would definitely wait until die off has subsided before moving to a zapper. It will cause die off also & you don't want to stress your body too much.
Maybe before bed melatonin, ornithine (mops up amonia from dead bugs too) & some warm milk will help. However, if it's die off the symptoms can go away overnight - though you might get some others. But they go away too so hang in there.