Welcome and be proud of yourself for getting to Day 11. It's normal to be very irritable in early recovery, but things will improve. It's good to be concerned about the holidays so you will have time to prepare a plan that will work for you. And, you don't have to tell anyone that you have stopped drinking. A 'No, thanks' should be all that is necessary. It might be a good idea to try to avoid get-togethers where alcohol is the main focus. I had to stay away from such situations for many months in early recovery. The main thing to remember is that you are doing the right thing and things will get better.