Hi, i am suffering at the moment & for the last year with a few symptoms. Some i have daily, then occasionally i have a really bad attack. Daily i have palpitations just sitting, very short of breath from just walking, constant fatigue, dizzyness, blurred vision, chest pains, tingling arms and legs, or ' busy legs' where i feel i have too much energy in my legs. With an attack my heart beats really fast, i sweat, get diarea and sevrley tremble, these can last up to 4 hours & have always happened late at night. Ive been tested for phaechromoacytoma and im currently talking tilidem retatrd 90 mg . I dont drink alcohol or take any kind of drugs. I have also cut out caffine in my diet