You may need to have the dentist lance it for you. I definitely would not "pop" it. You could cause the infection to go into your blood stream which will cause sepsis, or blood poisoning. If it doesn't go down by next day, I would call dentist to get it lanced.
Hello,
I recommend that you call your doctor's office and ask them if the swelling is normal, because when your upper or lower jaw swells with an abscessed tooth it's indicative of a very serious infection. When you call them you can also ask about the pocket of poison but I am surprised your doctor did not drain it for you to clear out some of the infection. It's dangerous to try and pop these pockets on your own because it can cause you to force some of the infection into your blood stream. It's best just to call the professionals and get their opinion. Best of luck to you and keep us updated!