Question About Central Air Conditioner Outside Compressor Units.....

It cooled off considerably last night and I shut down my A/C and opened my bedroom window to take advantage of the cool fresh air.

I woke up this a.m. feeling wobbly, disoriented and nauseated.

Later this afternoon I went outside to sit on my deck and breathe in fresh air and noticed my next-door neighbors A/C unit compressor (which is situated between our two houses) was running and then I maybe smelled a chemical odor in the air.

Putting that together with my bedroom window being open all night - I was wondering if an A/C Compressor unit can emit anything that could have been blown or sucked into my bedroom window while I was sleeping that could have caused the symptoms I am feeling.

Any helpful info would be appreciated.