The exposure referred to is CO, for carbon monoxide, not c02. If your CO detector is working, you should be able to obtain a series of values and that would give you the answer. There is a way to obtain a continuous record of exposure levels but that is not necessary. Just getting an accurate reading at times when you are symptomatic would suffice.
Just some clarifications:
CO2 is carbon dioxide.
CO is carbon monoxide (gas containing one oxygen atom and one hydrogen atom)
Regards,
Roberto
I wonder how I could convince my local doctor of this - he allready thinks I'm borderline obsessive unfortunately.
You might even want to call your local fire deaprtment (non 911 of course) and ask them if they have an CO detection equipment and if they could come out and check your room.