I have had fms for at least 10 years and take high doses of both amitryptiline and gabapentin. I get breathless so easily,even getting into bed! My heart races and I feel faint and I'm left gasping like a fish. I've had all the tests and all the blood work but have just found out a correlation between ami and arrythmia. I am off to the docs to explore this further. Has anyone else discovered this? Previously ,when I exhibited signs of acute breathlessness,my GP suggested I got a fan!!??