I hope they find the answer to your tiredness, Rhapsody. I had a study done last month and received a sleep apnea diagnosis. I am now using a CPAP machine at night. I thought it would be awful or uncomfortable, but it's really not. I can't tell if it is helping me with tiredness or not, because I probably have tiredness for other reasons than sleep apnea too. (I don't sleep enough.) When I went to see the respiratory therapist to get a machine and mask, the first mask she had me try on was terrible! I immediately said to her, "I can't do this." I just couldn't get enough air with that mask and felt like I would suffocate--kind of panicky. She changed masks right away and the new one was far better and I could get plenty of air, so that's what she sent me home with. Hope you get your results soon.