Originally posted by: rahvin
You had an infection, she probably wasn't able to drill the whole root because she couldn't tell where it ended. If they can't see the bottom (because of puss) of the tooth they won't go to the bottom because they don't want to drill down into the jaw. As the infection dies (pennecillian) the pain will reduce and after a week it should be gone enough she can see the bottom and finish the root canal at which point she will shape your tooth for a crown.
You can take 800mg of Ibuprofen every 6 hours not to exceed 2400mg every 24 without damaging your liver. (That's the prescription dose for it). You can also mix and match with Tylenol, Tylenol is good for 5000mg a day so if you need a little more kick with some of that ibuprofen take a couple extra strength tylenol. If the pain gets horrible call her up and complain up a storm and demand a narcotic pain killer. They don't like prescribing them but if you make a good case that the pain is bad the majority will give you a real pain killer.