I finally figured this out. It’s potassium! I have adrenal fatigue from being too Low Carb for months. Adrenal fatigue causes the body to get rid of sodium, and then you’re potassium/sodium levels are out of balance. I have reduced potassium as much as possible and it’s made a huge difference. Palpitations are so much less- though not completely gone b/c potassium is just about in everything. It sucks b/c here I am having to drastically limit food again, but it’s worth it.