Space mountain? PLEASE ANSWER!?

hey, i am going to calofornia on sunday n we r goin to disney land. i was jus wondering about space mountain. I really wanna go on it but im to scared. My mom sed i have to go on it cuzz i nvr go on any rides cuz of meh stomach. i hav a fear of throwing up so it stops meh from doing this. I was jus wonderin if space mountain has any large drops? Like the drops wen u feel that weird felling in yerr stomach....thx