milesawaygirl - for some quick snacks ideas I love raw veggies, almonds, fruit, yogurt, cheese strings.
I don't know if other people will agree with me but if you are finding yourself eating out a lot maybe you can buy frozen dinners and eat those instead since they allow for portion control. They aren't ideal but if you don't have time they may be better than what you are currently eating. Just try to get ones with lower sodium
I am a student so I kind of know how you feel about no time. When I first started school again I said I had no time and kind of gave up on weight loss. I was frusterated because I had no time for exercise. But then I realized that while exercise is important to be healthy I can lose weight just be making better food choices. Pick a calorie goal that will allow you to lose weight (there are tons of calculators online) and then no matter where or what you are eating make sure you stay around that "magic" number and you should lose weight.
I am sorry you are so stressed right now but don't give up on yourself.