Is my magnesium supplement the cause of all my reactions, or is it the detox, or is it both!?

Additional Details: I was "diagnosed" with magnesium deficiency through a live blood test a few weeks ago. Since then, I've started taking the supplement CALM, which I was fine with. BUT when I decided to take a bath with Epsom salts (a week ago), a half hour later I had a reaction where I felt I was going to pass out, with a racing heart, all clammy and shaking, etc. and it went on for a bit with symptoms lingering around the next day. Then it all passed. A few days later, I thought I would try the magnesium oil in the bath as recommended, and the same thing happened except worse! So for sure I know it's connected! Now, a few days later I'm still having symptoms, just feeling panicky off and on, feeling short of breath, like a lack of oxygen. I'm thinking it was too much too quick, but wonder if there’s anything else I should know about. Also, I’m feeling more fatigued than normal with headache, and that started the same time I started magnesium supplementing. I also changed my diet at the same time with no sweeteners at all though, and I’m improving my already whole food diet. So not sure if it's the magnesium that's causing that or detox or both!

I’m inclined to think it's the hot bath that's doing it. Have you tried just a foot bath with magnesium? If that still gives you the same reaction, try magnesium glycerinate in pill form.