Sure, but people bring it up every time someone hallucinates or thinks they heard something that wasn’t there. Everyone should have a CO detector, absolutely. But because some guy correctly guessed it 9 years ago, based on the size of OP’s tiny 3’5" x 10’ bedroom, people think it applies to every post.

Carbon Monoxide poisoning will make you weak, dizzy, cause headaches, nausea, a whole slew of symptoms. It’s incredibly unlikely that the only symptom would be aural hallucinations while listening to white noise.