D.B.
I think it's risky to go to the internet to diagnose yourself. Looking for adrenal fatigue, for example, or trying to pin everything on a condition your read about, can take you down one path and have you ignore others.
That said, I will tell you that my husband just went through a period of several years of mounting anxiety, which we attributed to the sort of things you are experiencing: too much to do professionally and personally, exhaustion and inefficient/ineffective sleep, rising blood pressure despite an extremely healthy lifestyle/diet, and general unexplained symptoms. Eventually they manifested as extreme BP (290/180 - yes, really), irregular heartbeat, insufficient heart pumping (called ejection fraction) and more. He spent 4 days in Cardiac ICU and other than massive amounts of drugs, there was no explanation or treatment other than "You're in your 60s, so just sit around, do nothing, don't exercise, take your BP 6 times a day, and count out your pills." We got out of one major hospital system and into another, where we found a fantastic team of cardiologists who brought in an endocrinologist because my husband's totally healthy lifestyle (looks 48 instead of 68) and the absence of shortness of breath (which most heart failure patients have, yet my husband was easily running over 25 miles per week). Turns out, after a bunch of tests and scans, my husband had a very rare (and treatable) condition called a paraganglioma, which is a non-cancerous tumor that does nothing but produce massive amounts of stress hormones (causing the "fight or flight" feeling). Long story short, these were bombarding his heart over a period of years, causing all the symptoms of heart failure. Removal of the tumor laparoscopically and some simple follow-up treatments have restored him to full health. There is a similar condition called a pheochromocytoma and actually the surgeon didn't know which one he would find until he got in and took a look. Anyway, my point is - get a team approach to diagnosis!
I expect you will get lots of recommendations to take this vitamin or that mineral or some amino acid or essential oil - let me just caution you about that approach. The body does not absorb individual nutrients like that. For effective cellular nutrition, you need various nutritional elements in combination, because so many need their "partners" in order to function. Most people know that calcium requires Vitamin D, for example, but there are over 70 that work in this way. So standard multivitamins don't even have enough. Even our ridiculously healthy diet and regular exercise weren't enough to meet our nutritional needs, and the American Medical Association issued a paper about 15 years ago saying everyone needs to supplement. We have been doing this for 9 years, and there is no question that it reduced my anxiety/depression (which seems to be related to inflammation, as so many conditions are), and this enabled my husband to have such good heart strength, low cholesterol, energy and even elasticity in his blood vessels to allow him to survive the ravages of this very rare tumor over an estimated 5+ years. We use an anti-stress nutritional supplement regimen too. We have energy without caffeine or those deadly energy drinks.
So, while I'm not suggesting you have the condition my husband had, I'm saying there can be things that occur in combination with a stressed out lifestyle, and it can be hard to sort out what's manageable through more effective supplementation and what needs medical involvement. There are things that can be ruled out or ruled in. Our team of cardio/endocrine/surgery were terrific together, and very much viewed us as valuable partners in my husband's care. (They are even taking some of my management techniques/records and trying to implement them hospital-wide for the benefit of other patients.) They felt strongly that there was a role for the products we use, alternatives like yoga and meditation, and medical procedures. They now have pronounced my husband's heart fully recovered and say that he exhibits no signs at all of having had heart failures. A true miracle - but it isn't really - it's science and food science. So please investigate sooner rather than later.