Root canal...Please help!!! I have damaged my teeth by clenching. Because of my abscess and trauma...?

it took 3 visits over a few weeks to complete my root canal...and it still hurts. It's not abscess or nerve pain, it's different. They filled it on Wednesday, and it hasn't stopped throbbing. It's a dull throbbing, but a throbbing none-the-less. There is also a very strange kind of pain up near the apex, like there is a foreign object inside my gums. Almost like someone is sticking me with a needle. I can't smile or move my upper lip to far without this awful stabbing sensation. I'm *REALLY* sick of being in this kind of pain in the front of my mouth. I CAN'T TAKE IT ANY MORE!!! I called the dentist yesterday (only 1 day after finishing the root canal) and he said it needs time to quiet down, because of all the trauma (years of hard clenching and grinding) it may take a while to heal. He said to wait until Monday or Tuesday, and if it still hurts to call back. Has anyone had any experience like this, what would be causing that stabbing needle-like pain??? Please help...

Root canal...Please help!!! I have damaged my teeth by clenching. Because of my abscess and trauma...?
Call your dentist and have him get you a prescription for dexamethazone 0.75mg, its and anti-inflammatory that will make it feel better. Pain is caused from infection or inflammation. Hopefully the infection is gone. Working on the tooth causes the surrounding tissue to be inflammed.
Reply:Actually, I had a root canal, and by the next day I'd never have known. Your dentist needs to take a look at it. It should not still be hurting like that, besides, your roots should be gone.
Reply:When I had a root canal it took a few days for the nerves to adjust to the changes. But it was more of a dull pressure sensation than a throbbing. Perhaps he missed part of the nerve?