What do you mean by heavy drinking? How much is considered heavy drinking?

Heavy alcohol. If you want the answer from a medical/health perspective, I can tell you that over 2.5 drinks per day for a man and 2.5 drinks per day for a woman can lead to liver cirrhosis.
If you... ...Regret, can't remember, or have been harmed by anything that happened while drinking, that's heavy drinking that needs to stop.