Earlier quoted context omitted.
And even if you're young, if you find yourself waking up at night with your heart racing, excessive snoring, etc, get it checked out. I got a CPAP machine at 20, and it's hard to overstate the impact. You can even just straight up buy them these days and adjust the settings yourself, sometimes the insurance premium on the sleep study is as high as the cost of the machine.
where can you buy them without a prescription?
The cost is not insignifigant. Cost of the machine itself is around $1000, and then perhaps $150-200 in supplies every 3 months.
Totally worth it though. Life changing.