Can’t stop once I start

This has been an issue for me lately, once I start drinking I don’t stop until I passout and have nearly 15 or more drinks, I know I will get a 2 day hangover but once I start and get a little good drunk feeling I can’t stop, is there anything I can do to stop after a certain amount of drinks.. sidenote: I only drink once a month but when I do I don’t stop until I passout