My dog hasn't pooped in 2 days, is she constipated or does she have a full obstruction? She isn't vomiting.?

I had her to the vet on Friday because she was on and off with diarrhea and vomiting, he gave her antibiotics and she has been fine ever since.

what would make think she has an obstruction? Has she eaten any bones?If not vomiting that's a good sign. Could just be constipated. Make sure is getting plenty of fluids. And try some 100% pumpkin about a tablespoon Not the pie filling kind of pumpkin it has to be 100% pure. Its in all stores. That should help her have a bowel movement.Good luck. Hope all works out for her. Been there I can relate with stress.