Sorry to hear you are having such a hard time. I am sure the stress in your life is not helping your control either. I can tell you from experience that traveling and diabetes is a hard mix. I also travel for my work and deal with different environments all the time. I am hardly in the same place twice in all my travels and it makes it tricky to bring all this diabetes crap around with me. Especially the fragile insulin I carry (and I assume you also use insulin). Anyone that travels with insulin knows that you have all kinds of little issues to watch for.
First thing is to make sure you are not losing your insulin to hot or cold conditions. If you insulin has gone bad during the trip then using it to control your sugars will be useless. From what you say in your post you travel A LOT so just watch for that little issue. Also watch those stupid fridges in the hotel room. If they come with a little freezer in them they are probably too cold. Get a little thermometer and put it in there if you have insulin stored in the hotel fridge. That way you can adjust it to the insulin manufacturers specific temperatures as needed. I have also placed the insulin in a hotel towel and put it in the fridge for some insulation away from the direct cold. And of course don't ever leave insulin in the car because even on a cold day the inside of a car can get hot enough to make your insulin useless.
As far as food goes it is very tricky to eat out all the time while on the road and have any kind of good control with blood sugars. Unless you research the restaurant online and get their menu and nutrition information ahead of time you are just guessing at the carbs that are in their food. I was shocked to see what was in some of the stuff I was eating when i finally looked it up on the companies web sites for a few of the larger restaurants I was eating at. So if you are in hotels that have regular size fridges or even better the Suite style rooms with kitchen and fridge then you can do much better for dinner after work. For lunch I would suggest making something from "scratch" and bringing a cooler with you to work. At first I did not like looking funny bringing my own lunch cooler but it really helps to know exactly what I am eating and to have it be made from better ingredients that I have control over.
Then there is the "all mighty workout". You can help settle a lot of things down in your body if you are able to work out even for a 30 minute brisk walk on a treadmill or stationary bike or something like that. Since you are hotel bound all week you have that option most places. Get down there in the hotel "gym" and have at it. I found I miss my hour walk at night if I am not able to get it done. But I just pick it up and do it the next day. Even if you don't do a good job at first of making things a regular habit just do what you can. A great way I started out was by setting an alarm on my watch to remind me of workout times and night time insulin/medication times. For the morning I just do everything right after getting up so I don't set an alarm for those but you could set one for that also if it helps.
For the "Good Diabetic" itinerary you could be told what to do but I think you need to work that out for what YOU are willing to do and set patterns that work for your schedule mostly. But a simple schedule could be:
1 - Morning blood test adjust insulin for levels and the breakfast carbs
2 - Good Breakfast to get your day started
3 - Test again mid morning and adjust as needed
4 - Easy to digest and not heavy carb lunch
5 - Test mid afternoon to see what lunch is doing to your sugars and adjust as needed
6 - Eat a good dinner. This is a good time to fit in veggies and fruit if you can handle the fruit just do the normal carb count.
7 - Work out (you can eat and workout of workout then eat it depends on how well you do working out after eating)
8 - Test in the evening before the night time basal and see how the day is still going.
I guess the only other suggestion would be testing a little more often and correcting as needed. And researching the specific medicines you take for how they affect diabetics if you have not done this already. You didn't mention those medicines specifically and I understand not wanting your entire life put out here online but just see if something you take has a direct affect on blood sugars. I know some of the stuff I had to take for being sick lately was making me go all over the place with my sugar levels. But now I have stopped those and back to "normal" sugar levels.
Oh and one last thing is .... SMILE ..... Find a way to laugh or at least smile each day. You would not believe some of studies I have read about how a simple SMILE each day can bring your life into harmony. So find a way to have a good laugh or at least a few minutes to relax and realize that "YOU MATTER".
Good luck and keep posting how it is going so all the awesome people here can help you through this tough time. There have been some good books suggested and one other I would suggest that I just finished reading is Ginger Vieira's book "Your Diabetes Science Experiment" it has a lot of good tips on how to figure out why your sugar levels are the way they are and how to experiment with different techniques to get those levels under control.
Wow just read back through what I posted. Sorry it was sooo long but hope it helps.