Weight loss advice

You summed it up nicely - you can't eat the same way again. But small changes may be enough to maintain your weight loss. Can you eat an extra serving (or two) of veggies everyday? These (mostly) low calorie, high volume foods could take the place of calorie dense items. Can you park farther away from your office, can you make a point to take the stairs whenever possible? Bumping up your activity level will help your body use more calories.

Start with small (less stressful) changes.

Are you still logging your calories? I quit once during a really stressful time and ended up putting 30 lbs. back on which I'm now trying to lose again. So my advice is don't quit logging even in maintenance, and find healthy foods that you can make work for you during this stressful period. I do a lot of stir-fries of vegetables and a protein which are low calorie, quick to make, and very packable to take to work and microwave. You lost weight before so you know what you need to do. Just don't let stress get in the way and cause you to grab quick, high calorie snacks just to eat something. If exercise is too much right now, then keep your focus on eating within your deficit and worry about adding exercise later.

You need to pre make meals to take with you during the week. Get a set of glass travel dishes to use daily and then store your pre made meals in zip lock bags in the freezer. Just take them out and put them in the glass container.