I get heart palpitations fast all of a sudden and it continues for 10-15 min, My bp is 130/90, height 180 cm, wt 80 kg. I had gastric issues previously a month back, now it have recovered, Apart from that I had anxieties, but now I hV controlled a lot, not like I had 4months ago. I don't know mostly during evening or night, I started to feel lethargic, off mood, my thyroid is normal, but I have deficiencies in Vitamin D and B12 after test done two months back. I took medicine for vitamin D3. Why don't I feel active? Daily I walk for 3-4 km, I do not have any other issues except these sudden lethargic feeling, and heart palpitations. I even did an ecg ,it was normal too. Not a smoker or drinker too.