HOWEVER, I was never very good at geometry because evertime I drew a circle, I'd start to feel sick

I once tried that boat thingy that goes upside down and I think I vomited up some stuff that I ate back in matric! It's quite strange, but I think it means that aeros would be a no-no for me.
One tip I've heard of though:
If you or your pax is prone to airsickness, the solution is to eat apricot jam before your flight.
It doesn't stop you getting sick, but fortunately it tastes the same coming up as it did going down.

