anyone deal with constant fatigue?

Low blood sugar is usually the cause when my head gets foggy. Without knowing more I might suggest you are behind on your nutrition. I think the idea is the brain cannot store energy and relies solely on blood sugar for energy. You might be eating a lot, but just not "Recovering" nutritionally from your workouts.

Kinda hard to tell because your logs are empty but as you can see from my logs, I am also putting in a bit of training and from my experience, keeping up with nutrition, especially when doing 2 or 3 separate workout sessions per day is key.

Maybe  take a look at what you are eating in terms of kCals, Carbs, Protein, Fat etc. and make sure you are getting enough. This can be super tough because getting an accurate read on your nutrition needs can be a dodgy proposition. I only have a general idea based on trial and error over the years.

Not sure if that helps or not....

Are you only fatigued at work or are your workouts suffering as well?

Try separating your long bike and long run.  Try your long run on Wednesday and see if that helps with the fatigue.  I would never prescribe back-to-back long workouts unless scheduling/time constraints are an issue.

I would agree that you will be better off separating your long bike and long runs. No benefit to running on tired legs and adding your two big workouts on back to back days.

Enjoy your trip.

If this fatigue continues, you should reconsider your training load and weekly training plan. See if altering some aspect may allow you to absorb your training better.

I deal with constant fatigue at some point in every training cycle I do. At first it was a real downer and even a bit scary having worked so hard just to feel like the dumps, but I kept training logs, and it pretty much always coincides with peak volume of my training. I know, duh no surprise, but the reality of ending up going slower and feeling worse after doing weeks of solid training is always a real downer.

You just have to remember that if you beat your self down to that degree, you're probably doing it right, and that after a pullback week, or a prerace taper, you'll be killing it compared to your old self. Of course, make sure sleep and health are in order, but if you look at your logs and you're doing pretty much your max volumes for a few weeks, expect to feel this way.

For me, following training plans are important specifically because they allow you to break through, even when you feel crappy like this. Without a plan, most folks give up from the fatigue and demoralizing slower paces just when they're about to really improve. If you're on a plan that you can trust, you can often hammer through an awful-feeling week or two, get a scheduled pullback week, and come back significantly stronger. (Many plans do volume pullback weeks every 3-4 weeks)

Have you considered a more intentional and/or customized nutrition plan?