Another piece of puzzle ---> sleeping in the room without enough oxygen

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I found another cause of my recently chronic tiredness: my bedroom didn't have enough oxygen.
Last night I lied in the bed and could not fall in sleep because I literally felt suffocated. My body needed oxygen! So I had to open windows and door fully and also opened the window in the hall way so air could flow through entire room. It really worked because in this morning, for the first time since "quite a while", I found my chest felt much "lighter". Also, my whole body felt more refreshed than previous mornings.

Of course, this is just one piece of puzzle. I still need to fix a lot of things.


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