Yes, every time the dentist puts a drill on a tooth, it introduces some trauma to the nerve. That said, make sure this time you see the crowns with a try in paste first. This is the same shade as the actual cement and will allow you to see what the crowns would look like before cementing them ...
When crowns brake is due to a bad diagnose, occlusion is one of the most important things here, and needs to be checked before giving a solution, now, the size looks big, and this can also be a problem for good support, do teeth have root canals and posts? are they fused together?do you have...
If you were hitting high on a tooth for a month it may take 3-10 days or so to feel normal unless there is a more complicated issue. The important thing right now is if the tooth is feeling better, even though it is not perfect. If the tooth continues to feel better and better than be p...