Your post raises concern for chronic hypercapnic respiratory failure  basically you skeletal disease causing chest wall restriction leading to hypoventilation. A benzo (such as alprazolam) would acutely worsen this, not surprised things got worse. Strongly recommend you see a pulmonologist asap. You probably need something like nocturnal BIPAP to blow off CO2 and improve your symptoms.
My disease may have caused respiratory involvement.Hello, I am 28 years old male 165cm 22kg Malay. I have been diagnosed with rare disease named Congenital Fiber Type Disproportion Myopathy in 2010. I also suffered Combined Scoliosis and Lordosis and has to use wheelchair. The scoliosis made my left lung smaller than my right lung. I refused spine surgery as I deemed the risks outweighed the benefits. I discontinued medical checkup in 2011 as there's no other treatment available. My skeletal muscles is progressively weaken over the years. Since last month after recovered from a flu, I've been having daytime sleepiness despite 7-9 hours of sleep. I also frequently woke up from a dream with a headache. Rarely, I woke up choked or gasping for air. I also has multiple awakening at night. My Gp prescribed me with 0.25mg Alprazolam few days ago to help me sleep better. I did get uninterrupted sleep, but it did not help with daytime sleepiness. I stopped Alprazolam after I read about the withdrawal symptom. I planned to schedule an appointment with sleep specialist. I'm afraid my disease has respiratory involvement.