Why on earth are beers still in the house?? You don't have to test yourself you know! Please, please do your sobriety a favour and tip it away or give it away or something!
There are lots of AA speaker recordings for beginners in sobriety available. Perhaps listening to one of these in the lead up to the witching hour might help?
Changing your routine a bit more so you aren't doing the other parts of your ritual at that point (even if only for a while) would be useful as well. Perhaps take a walk, or even drive somewhere for a walk. Even better, get to an AA meeting or similar.
You are likely to have pink cloud days when your resolve is strong and you feel very positive. You're also likely to have days when it feels like a battle. Like you're being thrown around like a puppet by your addiction. You can get through both kinds of days sober, but the second kind will be easier with a local support network of people who know what you're going through because they been there in the past themselves.
BB
PS this is where I get my recovery speaker recordings...
http://www.recoveryaudio.org