@wangling I think your consult with NJH is a great way to begin to get some answers.
I'm not sure how they operate, but maybe, since you are a poor sleeper, you can ask about a sleep study, there or back home.
I was diagnosed with sleep apnea in2024. Based on my desire not to use a Cpap, it took 10 months to get seen, then fitted, for a mouth device for apnea. It works for me! My sleep scores (as reported by my FitBit) have increased from 50-60% to 75-80% and I feel much better.
I really believe my better rest (plus the vaccine) kept me from catching Covid from my husband and daughter last month! I now wake up, usually feeling rested, before my alarm clock rings.