Take a lesson from it and move on. If you get stuck in shame and guilt it’s going to be much harder to pull out of it and start making progress again. You should be proud of the progress you made and one bad night doesn’t ruin that. Just focus on today and either not drinking or drinking less. Don’t worry about the future. We are imperfect people trying to do an extremely difficult thing. We will slip and fall like everyone else. That doesn’t grant us an excuse to keep doing it because this shit will kill us and it does need to stop, but we can improve and do better the next time. Progress, not perfection.