I have had known heart palpitations for a couple of years. My ECG is normal, stomach bloating, face acne/rash/inflammatory, gassy belch wakeup, get out of bed with heart palpitations, lift case of water, walk upstairs, eating certain foods, donuts, caffeine, sugar, processed foods, meats, and cheese. I've known anxiety and traumas but it's not just because of anxiety. I know this with my whole being. I'm just 28 years old 112lbs female and I cant' run or stand up without having heart palpitations.
Palpitations should be evaluated by a cardiologist. This is most important to investigate first.