Mera forward motion is the important part. So keep the momentum forward.
I think the others had some good suggestions. Can you print or write down what you first posted? Maybe if you feel up to it, take some time to write down your feelings, your struggles with alcohol, your life stresses. It doesn't have to be elaborate or complicated. Even point for to help keep you focused at your appointment.
Lastly I would suggest writing out a list of goals you want to achieve. And reflecting on what you are grateful for both internally and externally.
Just putting some thoughts out there for you. I hope you are able to find it in you to do some soul nourishing activities until your appointment. Maybe walk, nap, have a bath, read a book, journal, etc... anything small to soothe yourself a little bit.
Please try not to let shame be a motivator to drink. You can do this Mera, you have it within you, and you are never alone. Lots of us have been or are where you are. Hang in there sweetheart