It sounds like you simply need a game plan.
When I was busy, super stressed with a newborn and an older child and a job and a husband, here's what I did.
1. I cooked something on Sunday to eat all week (it really only lasted us 3 days).
2. I made something on Sunday to eat for lunch all week.
That meant for 3-5 days, we ate the same lunch and the same dinner.
It sounds like you simply need to do that.
So, week 1:
Lunch: Loaf of bread, pound of turkey, small bag of mixed greens, mustard or mayo packets, 5 apples, 1 lb baby carrots, one bottle salad dressing. Sandwich (with greens), apple, simple salad
Dinner: chicken breasts, teriyaki sauce, rice, 12-16 oz bag of fresh or frozen broccoli. Cook the chicken in the crockpot with the sauce (or on the stovetop), cook rice, steam broccoli. The amount of ingredients you cook will depend on how much you eat.
Other lunch options:
Salad (mixed greens) with other veggies, nuts, and hard boiled egg
Bean burritos and raw veggies with hummus
Pizza
Other dinner options:
Chicken cooked with salsa = tacos
Spaghetti and meatballs (one pound of spaghetti is 8 servings, but depending on your size...)
Chili
Beef stew
Curried chickpeas and rice with vegetables
I think what you just need to get over, and accept, it that you will probably be eating the same thing all week.
But you can change it each week.
I cook chicken breasts in a crockpot with one of the following:
Marinara
BBQ sauce
teriyaki sauce
salsa
And just eat it with a carb and a veggie.