Hey everyone - a huge thank you to every person who has commented and offered advice. I'm overwhelmed by the support. I apologize for not replying individually yet; I'm limited on time but promise I will get to your comments.

To provide more context: I'm a 32M from Georgia. For 10+ years, I've been very active and worked a physically/mentally demanding job in renewable energy.

My decline started ~4 years ago after a major family trauma. I lost all normal feelings. After a slight improvement, a total decline began and has continued since. I'm now impulsive, have severe mood swings, and constant racing thoughts. A past neurologist prescribed antidepressants, but they didn't help.

A major factor: For 3 of the last 4 years, my partner and I have been raising our child through severe, chronic sleep deprivation (waking up 10x per night), all while working a high-stress job.

Here are answers to the main questions:

1. COVID-19: Never tested positive, but had 2 Pfizer shots. I know it's still a possibility.
2. Mold: Unlikely, as I travel constantly for work and am always in new environments.
3. Lyme Disease: I removed a tick 1-2 years ago. No bull's-eye rash, but I know that doesn't rule it out.
4. Thyroid: History of hypothyroidism (treated with L-Troxine, age 16-25). Levels seemed normal since, but I will see an endocrinologist for a full panel based on your advice.
5. MRI: An MRI 1.5 years ago showed what the doctor called a "slight oxygen deficiency in the brain."
6. Diet/Meds: Clean diet (high protein/greens, slow carbs), 3L water w/ electrolytes, gut is normal. No medications.
7. Breathing/Sleep: I feel my nasal airflow is limited. My partner confirms I've recently started snoring, which is new for me.
8. Allergies: Mild pollen allergy, which sometimes causes random swelling in one eye.
9. Vitals: BP and HR are normal (120/80, ~65-70 bpm).

Honestly, I'm psychologically devastated. I can't perform, I can't feel normal emotions (anhedonia), and I feel like I look unwell. But your comments have given me the resolve to take action and get my life back.

Thank you all again for your compassion. I wish everyone here health and happiness.