I had a very similar situatiion...........in the ER they told me my chloride was off.............causing an electrolyte imbalnce.
Get your electrolytes correct & I donot mean by drinking GATORADE (it is very damaging to your liver b/c of the fructose) drink pedialyte instead which tastes nasty or concoct your own, calcium, magnesium, potassium & salt blend. according to your intuition. not someone''s recipe
I am seeing lots of people with depleted electrolytes.
Next up your co enzyme Q10 to about 300 mg a day until palps stop.
Having a very heavy baby can put alot of stress on your heart which the Co Q10 alleviates.