I think guilt is a fairly common feeling in early recovery but I promise, it will lessen as you realize the positive action you're taking now. It helps to realize that feelings aren't facts: just because you feel the emotion doesn't mean you're doing anything wrong! What increases the odds to staying sober is a program like AA which offers tremendous support from recovering drunks who have been where you are.
You just don't drink TODAY. That's it. Don't think about never drinking again (how do you know that?). No, you don't drink today. My last drink was in 1991 and I still don't drink today.
Big hug!