hello and welcome to hcm,
feeling no pain is the result of successful root canal treatment
and after fixing the temperory restorations, sometimes patient do feel sensitivity, and if there are some chances of hair line fracture
, then ask the dentist
to do tender on percussion test wher he will tap on the tooth and if there is fracture or some apical infection
, it will be tender to it and take one x-ray of that. hope you are not having any gnawing pain after fixation as it occur due to imperfect fit of crowns.