Depends on what they checked in your blood work to be honest.
Have they been monitoring your blood sugar for hypoglycemia or diabetes? Have they checked your thyroid? Have they checked your Adrenal gland? Have they done neurological to figure out if it might be Lupus? Fibromyalgia? or MS?
Low or high potassium can also cause what yu experienced.
Keep on them Gwen. I am sorry but Drs sometimes find it hard to think 'outside' the box. I have found that WE as individuals MUST stay on top of our OWN health care, ask questions, do our own research and bring suggestions to them.
In other words, VERY ACTIVE in our own health care and NOT just take their word for something.
I am glad the heart is still in good shape. One more hurdle finished.
Love and hugs,