I'm so sorry to hear of your loss. I had consistent control of my blood sugar for a good 6 to 9 months, but my counts were all over the place when my dad died in July. They have only just recovered. I didn't comfort eat, but tried to keep to my normal eating plan, and I was still seeing BG 8-10, when I would expect 5-6. As with all these things, people vary in their response, but stress is a definite factor for me. So much so that I have taken up meditation. Strange how many changes that this disease has forced on me, eating loads of greens, organised eating plans, organised exercise and now I find useful something that I thought was for spiritual people and not for me (although I have always kept an open mind). It has made a big difference, especially to my sleeping. I use the Meditation Oasis app., as they have a very practical approach.
I hope things get easier for you.