I am very sorry for your loss
Stress can be a big factor in weight gain.. Are you doing anything right now to try to lose weight? One thing you can try is walking every night... It doesn't have to be far at first, you can build yourself up to walk more... Walking can be a big stress reliever too...It gives you a chance to clear your head and just listen to the nature around you.. And you can take your daughter with you to go walking so you have company if you want...
Theres also a lot of good posts throughout this forum that has different healthy recipes and a lot of guidance for getting yourself healthy.
The one thing about dieting and exercising is you have to be mentally prepared to do it.. You have to be determined you want to lose that weight... I've tried numerous of times before on starting diets and exercising but I would end up quitting and going back to eating take out... This diet I'm on, I'm on for good... I have my mind set on what I want to lose, and the time I want to lose it in. I think what helped me most with my diet is that goal in a certain realistic time frame...