Hi, JODISAIM !
It sounds like you've been going through quite a bit recently. start with small changes. take baby steps, literally and figuratively. Don't try to do everything at once or you will end up frustrated. Slow and easy really does win this race.
Speaking of which, have you thought about taking up running again ? You don't have to run a marathon, but how about signing up for a 5K ? You may find training for a race a good way to help you reduce some of your stress. Studies have shown that exercise can help reduce depression and stress in many people.
As far as food, I agree. Start loading up on all those great fresh fruits and veggies you can find during summer. Buy cherries, blueberries, oranges, kiwi, etc... whatever is on sale, stock up. Think quality of the food more so than quantity. Let the food you eat nourish your body. You'll find that eating good food will also help and not just with your weight, your moods too. Eating foods that are high in sugar, salt and fat just reek havoc with our emotions. So, do your best to eat more and more wholesome foods.