Have you considered the possibility that you're surrounded by &*$#~'s?

Seriously though, a few off days can happen. Get your salt. Half-salt that has some potassium might be a good idea, too. Also a magnesium supplement is a good idea. I'm over a decade in, and I'll still get occasional stomach muscle cramping with exertion sometimes, if I don't make sure about getting in the half-salt. I put a little in my coffee, plus in the morning I'll put about a teaspoon in a glass of water with a packet of stevia/erythritol and take little sips through the day at will. I find if I do it without the sweetener, I'll end up forgetting to sip.