Advice for hyper-sensitivity to exhaust fumes

Hi all, I was very, very recently diagnosed as Autistic and it's suddenly been a revelation for so many things throughout my life.

Due to some big life changes, I've recently moved back in with my parents for a while and they live very close to a motorway.

I am a 'fresh air' addict and permanently have a window open, as I can't stand a room feeling stuffy or closed in. However, I have found that I can constantly smell the exhaust fumes from the motorway here and it's making me feel nauseous throughout the day. I have asked my parents and they can't smell it at all; I assume I am hyper-sensitive to the smell.

I don't particularly like any strong scents, so I wouldn't be looking to mask the smell with anything else, but I wondered if anyone had any suggestions for neutralising smells or if there's anything I can do, mentally, to turn my focus away from this constant smell. Does anyone else have a sensitivity to exhaust fumes? I've tried googling but can't seem to see any specific discussion of people who have this issue.

I also am unsure whether I am imagining the smell! When I'm outdoors, I don't notice it at all, but with the window open, it seems really strong. I'd just be interested to know if anyone else has this experience? Thank you