Depends. If the fillings were deep pain is more likely to be present, but if the fillings were shallow i would say that it is unusual. If the pain does not start to subside within a few days i suggest you call your dentist.
Not uncommon. Many times fillings can be deep and near the pulp/nerve and though they don't get there it can be irritating like a bruise. It should peak over the first couple days and then taper off, if not contact you dentist.