When do I get worried about how much chocolate my dog ate?

We came home to find that our Corgie had managed to get one of the stockings down and chewed a hole in it. She ate a package of Dark Chocolate Milanos, a bunch of fun-sized chocolate candy bars (including wrappers) and chips and pop-tarts. She seemed fine last night, but today her belly looks a little bloated. She doesn't seem to be in any pain and there's been no vomiting or diarrhea. When do I get worried that somethings wrong...and what do I do about it? (Our vet doesn't open until Monday and the emergency vet is REALLY expensive!