Why are you feeling guilty?
There is no compulsion in your religion and you are advised not to pray when you are drunk.
I have friends from six sects of islam that choose either to not consume alcohol or to drink it.
None of them feel guilty; they make their choice, stick with it and focus upon doing as many good deed to help other people as they can.
You have the choice how you practice your religion, how your interpret religious scripture and whether you want to consume alcohol.
Don't make a big issue of it.