I wont comment on the when it will stop part cause I have no idea about non spewing pregnancies but having a jatz before you stand up might help? Peeled green apples, fruit tingles, Fox Glacier Mints and those just add hot water hot chocolates helped my tummy (much later in my pregnancy though). Might not help but might be worth a try at least they arent so bad coming back up....

Big it really is an awful thing to experience.