Invisalign nausea?

I started on my invisaligns a few weeks before I got pregnant, I'm currently 6w+5 and every time I pop my aligners on, I get this urge to throw up immediately. I was doing fine before yesterday, and I even tried taking it off an hr before my meals and only putting them back on another hour after I've eaten to avoid this kind of thing but none of that worked today. I just tried putting them back on after not wearing them for most of the morning and 2 mins after they were in my mouth I started gagging. Does anyone have any advice for me please?