I feel better when I leave this house

 Currently feeling like crap 

Tired. Coughing and hacking up phlegm for over a week now 

Just ate breakfast at 4 pm. Now need to rest 

For many years I remember noticing how much better I feel as soon as I get out of this house 

I don't know what it is. Don't know why.

Told my son back in 2020 I noticed I feel better in his house and the only thing I concluded was it must be the air. Quality of air must be much better than in my house.

This house makes me sick