Been in those shoes
I can tell you though it gets better if you stay sober today. I got through a divorce as well - very hard but stayed sober thanks to God, my sponsor and my AA home group. Your sponsor is right - just deal with today and tomrrow will take care of itself. Hang in there and know that the #1 most important thing you can do is to stay sober. The rest takes a lot of time to work out, and there will be pain and worry because none of us are perfect at this stuff, but if you are meeting priority #1, it will work out better than you could imagine. God bless