Well, it's really great that you can see a pattern in your behaviour in the weeks before you started using. I was like that too. At first, I would think it was just a spontaneous thing, and I would find myself in the wine aisle at the supermarket. But, after getting some perspective, I see that I was heading that way for days before it happened.
You really should talk to your dr about your moods. It's possible he will have some insight and maybe antidepressants will help you.