Irregular beat

These days, I noticed that sometimes I have irregular pulses. My heart beating sometimes delays as if it's skipped, and at the same time, I feel the chest oppression. I have irregular pulses approximately at the pace of once or twice a minute, and this condition lasts from twenty to thirty minutes.
In the beginning I was quite afraid that someday I will have my pulse delayed, and it will never come back. However, I soon found that I don't have to be very afraid of it: I cruised the internet to find that this kind of irregular pulses is common, and not very harmful to my body.
It is not caused by the heart problems. In my case, the most possible causes of this are the anxiety for the future, irregular habits, too much alcohol, lack of sleep and bad food habits.
I have to take care of myself, even though I don't feel any fatigue and mental stress consciously.