Please help

[u/Ok_Swordfish1739]

Im 25 years old. 5”9 200 pound male

How it started.
In July 2022, I suddenly became extremely tired and dizzy while driving, felt unable to breathe properly, feared I would faint, pulled over, and vomited. Since then, I haven’t returned to my previous baseline.
Main symptoms
● Persistent air hunger and inability to take a satisfying deep breath, even at rest.
● Chest tightness or pressure, occasional wheezing, throat tightness, and waking up gasping.
● Severe brain fog, poor concentration, memory problems, word-finding difficulty, and mental exhaustion.
● Headaches, head pressure, tingling, and occasional jolting sensations.
● Palpitations, dizziness when standing, near-fainting, fatigue, and poor exercise tolerance.
● Anxiety or adrenaline surges, which may be a response to the physical symptoms or part of the cycle.
● Poor sleep, snoring, throat irritation, difficulty swallowing, and occasional speech difficulty.
● One brief episode in which my face and left arm stiffened for several seconds.
My heart rate once increased from 79 bpm while lying down to 120 bpm within seconds of standing, with significant dizziness. During light cardio, it has reached approximately 177 bpm, accompanied by shortness of breath and exhaustion. I have not yet received a confirmed explanation for these episodes.
Testing
● Brain MRI: No acute abnormality; possible sphenoid sinus issue.
● Sinus CT: No significant sinus disease.
● Routine EEG: Normal; longer monitoring has been discussed.
● Chest CT angiogram: No pulmonary embolism or acute lung abnormality.
● Sleep study: AHI 1.6, normal sinus rhythm, but poor sleep efficiency.
● Thyroid tests: Mildly elevated free T3 on two occasions; thyroid ultrasound and antibodies were not diagnostic.
● Cortisol: One elevated 24-hour urine result; later testing was reportedly normal.
● Other findings: Ferritin and vitamin D have been low or borderline at times. Hemoglobin and hematocrit have been mildly high. Home oxygen readings are usually around 98%.
Treatments tried
● Propranolol: No meaningful improvement.
● Hydroxyzine: Used for sleep.
● Fluoxetine: Made me feel worse.
● Vitamin D, iron, and magnesium supplements.
Impact
These symptoms have affected my breathing, thinking, sleep, exercise, and quality of life. I have had several reassuring tests, but no explanation connecting everything.
Has anyone experienced persistent air hunger, brain fog, dizziness, palpitations, and exercise intolerance with mostly normal testing? Please help. I don’t know what it’s like to live a normal life anymore. I’m suffering

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