I would discuss this with your normal vet-both that you got really bad advice, and that she couldn’t see you in an emergency. My vet can’t see us after hours, but she tells me who to go to. Your vet needs to give you an emergency back up; and if that was the backup she recommended you need to discuss!
Yes yes yes you force feed for stasis. -both for the fibre, and food but for fluid. You also want to get them moving around. Some have faith in gas meds, I do not and my vet does not, but then I haven’t had tons of stasis episodes to really try it. But I wouldn’t count on it. Pain meds are OK but they can also be hard on the tummy. What you really want for stasis is a gut motility drug (Reglan) sub Q fluids (or IV fluids) force feeding and get that bunny moving.
Debrief with your vet for sure, if you are having frequent gas/stasis episodes, then you may want to get rid of greens (Except one) reduce pellets, increase hay; then add back greens/veggies one at time; you want to figure out if there is a particular green causing gas which in turns causes pain and then anorexia and the stasis.