i just realized where you guys live--i sorta know port jervis. via greenville and such.
but anyway, reba once had an intestinal blockage and the symptoms were anxiety, lots of vomiting, generalized tremors, and eventually an inability to poop. it was not good. i'm a worrier about such things, so i still vote getting to a vet ASAP. if you don't have an emergency vet near you, you might just try calling your regular vet's emergency number at least to let the on-call or emergency service know what's going on . . .