That's me as well! I get motion sickness on those spinning teacups.....lol. I've worked out I can do rollercoasters because the degree of turn isn't so sharp and severe. Anything that spins around like the waltzer is off-limits for me.
I'm not very good on these rides either...All my kids love them and have managed to persuade me to go on them. however, I usually come off with legs like jelly..