I think eating a little of 3 different healthy things is a good way to go, keeping it simple like cuz suggested. When we can't have our comfort foods that are the problem, eating can be a chore for a while. It's normal, but you can do it. Remember, it's actually good for your brain to change your patterns and problem-solve instead of just eating robotically.
I use to feel the same way about eating every 3 hours! It definitely takes some effort to force yourself to eat sometimes, lol:) Everyone is different but I'm sure you'll get use to it. Try to stick to the time and just eat small meals to keep your metabolism up. For example, eat half an apple, a few raw almonds, and piece of string cheese. If you can only eat a few bites of each, at least that's something.
Try walking...it'll help burn calories making you hungry. Stick to your eating schedule, you will see a change. I lost 20 pounds just by doing this alone...a lean protein, complex carb, and healthy fat every 3 hours. By not eating, your body is in starvation mode, holding onto every ounce of fat.
Congrats on getting through a whole week! Your body will adjust and the headaches will go away. Drink lots of water!