M.B.
My daughter is suffering with the same problems, and is only about 10 weeks along so they don't want her to take Sudafed yet... she did get antibiotics, though... She has the added complication of Asthma, and frequently the sinus infections go to asthmatic bronchitis......
I do feel for you... can you take Sudafed/Pseudoephedrine? Have you asked the doc about that?