please remember, your drinking landed you in the ER a few days ago. you've passed the point of normal drinking. and there is no going back to it. there just isn't.
sure maybe there have been times where at a single drinking session you only had two. but what about 3 hours later? 3 days later?
i commend you for wanting to have a goal. and if 30 days works for you and helps you NOT drink, then go for it. but please do not hold any ill conceived notion that somehow in 30 days your body will change, and your allergy to alcohol will somehow resolve. you'll still be a person for whom alcohol is deadly, you'll also be a person with a great start to a fabulous life free of something that wants to kill you.