Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you are mostly having stomach related symptoms.
Stomach contractions can cause similar kind of flattery sensations.
But better to rule out heart diseases like
arrhythmia. So first get done ecg, 2d echo and Holter monitoring (24 hour continuous monitoring of ecg).
If all these are normal than no need to worry.
Your symptoms are mostly due to contractions of stomach.
And to avoid these symptoms start
proton pump inhibitors. Avoid hot and spicy food. Avoid large meals, instead take frequent small meals.
Don't worry, you will be alright, but first rule out heart diseases.
Hope I have solved your query.
Wish you good health. Thanks.