I'm deeply saddened by your mother's death. I'm also in mourning because one of my pets is facing a terminal illness. If anything, I think that grief has a different timetable for each person. In other words, please don't rush the process.
If you want, you can focus on weight maintenance while grieving. You'll get a higher calorie range to prevent weight regain. I'll also share a few ideas that are helping me. They may work for you. If not, perhaps they can help you find your own coping mechanisms.
When I crave something sweet, I turn to instant coffee (decaf if later in the day) or tea with sugar-free syrup. Caramel is my favorite flavor, though I also like vanilla. Plus, the warm liquid helps me feel comforted and all I need to do is warm up some water in a kettle.
As a variation of the above idea, I have warm milk when I have trouble sleeping. Since I use powdered nonfat milk, I also heat up water first before whisking in the powder. If want to eat something with it, I like Wasa with peanut or almond butter and perhaps mini chocolate chips.
For mindless munching, I turn to vegetables. I prefer steamed with melted reduced-fat shredded cheese, but raw is also good. For a dip, you might like plain Greek yogurt with herbs or onion-soup mix (check for sodium).
What I also like about vegetables is that they fill my belly. It helps me eat smaller portions of comfort food, especially those that someone else made. That way, I can further stretch out the leftovers in the freezer.
I sincerely hope that this helps you.