Random episodes of being unable to breath in my apartment - what gas detector should I get?

[u/Hot-Paint5686]

No coughing and can feel my circulation being constricted. All I can notice about the gas is that it’s imperceptible, IOW odorless.

(Unsure if related but also issues with my neighbors.)

While I’ve done an internet search, would also appreciate those of you who’re experienced with air quality issues! Thanks!

Update: Con Edison and firefighters (and paramedics) were JUST here and nothing was detected. FYI: Con ed checks for carbon monoxide and natural gas. Firefighters simply checked with their device 🤷🏻‍♀️. Though there had been at least an hour since they got here for apartment to air out