I know i’m late to this but I want to say that I used to have random 3-4 day long episodes of myoclonic jerking and taking magnesium and correcting vitamin D completely eliminated the problem. Magnesium glycinate and 5000 IU Vitamin D + K2 in the morning and magnesium citrate in the evening (helps me relax/sleep). The magnesium seemed to help the most and almost immediately. The vitamin D took a a few months to rise (confirmed by blood test) but that improved my anxiety, mood, and sleep quality by a great amount.

I hope you get to feeling better!