I was sitting in the new TT for an hour reading the manual. I found it getting difficult to breathe. (with the door open) I went to the restroom in my home, washed my face, and my face was bright red...
Some makes of campers are worse than others but when it quits raining open it up & let it "off gas & air out" .....You are probably very sensitive to the off gassing of the glues in plywood, & the chemicals used in carpets, & plastics.