You've certainly had a rough several months...it can't have been easy for you. And, the reaction of your daughters may have been anger, or their own way of dealing with grief...everyone handles such dire situations differently.
You were able to quit drinking before, so whatever you did then...double your efforts. Perhaps a combination of AA meetings, plus some serious grief counseling would be worth looking into. You definitely need a strong support group...but, keep posting here at SR and letting us know how you're doing.
Hugs and prayers.