If the congestion is still, indeed, in your sinuses and has yet to move down to your chest, then in addition to the remedies suggestion above you may also wish to try a neti pot and/or garlic--though not together. A salt-water nasal wash can open the nasal passages and wash out mucus and bacteria. For the garlic--you can eat it raw, or, if you don't care for the taste and pungency, you can boil a few cloves in water and then inhale the resulting garlic steam.