This is probably just post-filling pain. It is uncommon, but does occur, since filling is to stop pain and help the tooth. The pain should go away before 14 days have passed from the time you got the filling. If not, I'd recommend calling your dentist to see the following steps you should take. It's usually best to save your tooth, unless the it gets bothersome and the dentist sees nothing wrong with it(which occurs.)
i am havign the same problem , i got a filling done n sence then ive been having reallly major pain.. the dentist told me to wait for a mouth to see if the pain go's away. i had to choose if i still have the pain to get rid of the tooth or get a root canal .. uugh ! i just wish i didnt have this pain. worst ever!!!!
Sorry to hear you guys are in pain, I've had similar issues, start by taking an anti inflammatory like Ibuprofen or Aleve. Mine was so painful I had to get on a steroid prednisone, but the pain did subside. A root canal may be in my future but for now the pain is gone. Your doctor can call something in for you since you already had xrays and they didn't see an issue. Stay away from Hot packs those make it worse esp if it's inflamation, it happens alot from what I'm seeing online. Don't lose hope, call your dentist, be open and honest about your pain. Don't panic if they say root canal, I've had two and to be honest they hurt less than a filling.