Sorry if this sound snarky, but --- have you ever heard about the law of unintended consequences and the masking of symptoms which could lead to more serious conditions over time? Just because there are other people's medicines in your medicine cabinet is no excuse to self-diagnose and start popping pills. You need a proper diagnosis because many of the symptoms that lead to the use of a CPAP may also be related to heart, lung, kidney, and systemic hormone issues. Best practices say to leave the diagnosis to the professionals to safeguard your health.
"The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane." -- Marcus Aurelius