I forgot to mention in my previous post that there are a lot of different kinds of Sudafed. For me, some work and some don't. The one that works the best is the turquoise non-drying Sudafed.
My doctor also prescribed pseudophedrine, which was the old Sudafed, but is now prescription only here in Oregon because of the meth boom. But I've had a heck of a time finding a pharmacist that will fill it while I'm pregnant.