The most fascinating part of this journey is finally understanding myself better. I've been spending hours every week reading others experiences with ADHD, watching videos (Dr. Russell Barkley is awesome), and in general just figuring out who I am and why I'm that way. I'm beginning to understand that habits I've had, such as being "hyper organized" (actually, being utterly dependent on my calendar) were just coping mechanisms needed to get things done. It almost warrants an entire self-evaluation.
Your description of the stress response seems plausible. All my life I've oscillated pretty strictly between hyper-anxious and utterly indifferent, the latter probably serving as a coping mechanism. Suddenly now I'm able to comfortably live in the middle ground. I'll do what needs done today, and know that what needs done next week/month/year will get addressed when it's time.
Anyway, I really appreciate the feedback and wisdom. Wishing you the best of luck.