I definitely understand. I have a very stressful 60-hr plus a week job myself. I ended up in the docs office in the beginning of May with palpitations and shortness of breath. I too have GERD (which remarkably is getting better now), and all from stress. That is what it took for me to figure out that I had to take care of myself, #1, because I could not do any of the rest of it otherwise. I was shocked to see how much I weighed. Probably at least 15-20 pounds more than I thought. I was sort of kidding myself that I'd put on 20, when it was more like 40.
So I started to eat healthier and exercise more on May 1. Not SBD, just sort of generically better. I lost about 7 pounds, but then when we moved to a new house in the end of May, I was off-track for June and some of July, so I gained back a few pounds, but overall was healthier and less stressed, so that was good. About the middle of July I started SBD, because I felt more ready to handle a more systemic change (and we were also not living out of boxes anymore). I also gave a lot of thought to the fact that I am an example to my fiancee's 10 year old daughter, who was with us for the summer and who is beginning to get a bit chubby (her mom honestly doesn't exercise and the food is very processed in their house, so I really wanted her to see something different rather than just hearing about it).
It was hard at first, especially, because it was something new and different and it took thought and effort. I will tell you, though, that it has gotten much easier. NO doubt P1 is very hard and you think mostly about what you are eating for that and for the first couple of weeks of P2. Additionally, I really think that it takes three months to create or change a habit, so in retrospect I see the last 12 weeks as being just that. I've lost 17.5 pounds too, but more importantly this is getting much more like second nature. I don't have a "finish line" in my mind when I can go eat a banana split every night and forget it all; I'm happy eating this way. Now I will say, I'm not perfect. Probably one out of every three or four days I don't eat enough vegetables. Probably once every week to two weeks I have something made with white flour, or a little fattier than I know is optimal. But I am in a place that I can stay. It's been a month at least since I've thought about "what am I adding next week" or anything like that. And interestingly, I'm growing less tempted to break out of it in some way, because I'm just getting used to it.
There are some things that work particularly well for me, but the biggest thing is that I am more apt to think of eating healthy as something that will make me feel better, not that eating a treat will do it. I had really tough hearings this week and I drank cups and cups of green tea and every time I did it, I was thinking about how it was helping my body stay healthy. I keep my vitamins/supplements in the office because I'll remember to take them there.
Another thing that has helped me is to sit down and make a list of the things I really like that are SBD friendly. It's easy to default to an old bad choice when you are exhausted and don't have the time or energy to think. Some of the central things for me are greek yogurt (sometimes with fruit and frequently with nuts), baby spinach salad with a protein, vegetables and a little goat cheese or blue cheese, cold "burritos" with a whole wheat tortilla, hummus, vegetables and shredded lowfat cheddar cheese, and "real" oatmeal (sometimes with fruit or nuts). Only the oatmeal requires actual cooking, and I think I am going to start making a five bowl batch on Sunday nights and putting it in the fridge in little Tupperwares. I don't think I could live on these as a daily plan, but they are all good options when there's no preplanning. Then I started looking at the recipe threads and just picking a few things to try, and adding to the list. I was overly dependent on cheese as a protein in the beginning, and I've gotten out of that. It takes some trying things out.
I am very lucky in that I have good options for lunch right next door to work. Custom salad place with shrimp/chicken/etc, and also there is a PF Changs, which is sort of fresh Chinese and you can get brown rice.
I keep track of what I eat in Fitday, though that's not for everyone.
I think the single biggest thing is that I think of taking care of myself as both an investment (because it allows me to get more done at the end of the day) and an indulgence -- because it's really the one thing I do for myself (as opposed to thinking of it as a punishment for past sins). I think that almost everyone who is heavier than they should be/want to be has to outsmart themselves about it once and for all, and then it falls into place.
I know this is a really long post, but I hope it helps you feel less stressed and alone about it:)