Ectopic Atrial Tachycardia. Get outside?

I was diagnosed with Ectopic Atrial Tachycardia 5 years ago with holter test showing ( Avg. H.r. 112, Min. H.R. 63 and Max h.r.167). And doctor suggested me to take metocard xl 25. I was confused whether to start the medicine or not. Because many general physicians said if i start this kind of medicines, I have to take it life long. Many doctors said it may be due to anxiety. Moreover my echocardiogram report was normal with showing grade 1 MVP. And my blood pressure is normal I started getting feeling that i may get a heart attack if my heart continues to beat as fast as like this. I stopped going outside in fear of getting heart attack. I also visited a psychiatrist. He gave me some anti anxiety medicines. After taking that it was a bit better. But i am very much confused whether to start medicine. Is it dangerous? Can ectopic atrial tachycardia needs to be treated ??? Can it lead to a sudden heart attack when i get outside??? Plzz help .. i am really frustrated.