As crazy as it sounds...slice an onion in half and put it in your room at night. It really helps the night nasal crud. Stinks up your room but it is worth it. I do it with my kids whenever they get a cold and it works like a charm. Sadly the crud comes back in the morning though.
Also, Fisherman's Friend cough drops are Amazing. Taste gross, but do the trick. So sorry you feel like crap :(