Tracey, it sounds like a bit of tooth was left behind when your tooth was pulled out, and that it has formed an abcess, which is what the 'sack' is and all the goopy stuff. I would definately see a dentist and he will be able to clean it up and give your some AB's if it is infected. (some of which are safe in pg) but for now rinsing with salt water should suffice and biting down on gauze is a great idea, becuase if the blood clot keeps coming out, you can end up with a dry socket and it wont heal over and can cause a lot of pain. If it does get worse though, definately go to the ER, they will at least be able to start you off with treatment. Don't know if it would be making your pg symptoms worse though. HTH