My heart skips beats. i started drinking a small glass of whiskey every day and it has completely stopped skipping. why & how did whiskey change it?

Slows nervous system: Even though you're young, you should still investigate why your heart skipped beats - i can't tell the reason unless i saw an electrocardiogram. Whiskey, like any alcohol, slows down the nervous system, sometimes including the heart, especially if the palpitations were related to anxiety. You might want to consider stopping the alcohol and figure out what's really going on, consulting your doctor.

Anxiety?: Alcohol is a drug. It's a sedative. It can calm a person down. I suspect, after some time, the amount of whiskey will need to be increased in order to provide the same effect. Over many years and if this happens, you can see how one could become dependent on alcohol. If only one shot of whiskey does the trick, you may be fine, however, there are better treatments, in my opinion.