this would be a question for your clinic. It's pretty standard to withhold supplements for a week or so before a major surgery, but I can't remember if I was told that before my WLS or not (it's been too many years), and I'm not 100% sure if that would include calcium and magnesium. At any rate, what you're experiencing isn't normal - or at least not common. I've been hanging out on this site for over seven years, and I don't ever remember reading anything about this. I guess it could also be weather-related since most of the country is under a heatwave (my arthritis acts up when the humidity is high), but I don't know. At any rate, that sounds miserable! I hope you can get through to someone today to get some answers.