Have you tried a Vitamin C supplement? My personal favorite is called Emergen-C, it's a powder you mix into a liter of water and sip at through the day. It has 1000mg of vitamin C and the flavors are really good, and it does wonders for recovering from illnesses. I'm prone to bronchitis, and when I feel it coming on I grab some from the store and it helps me get through my days without falling susceptible to other viruses on top of the bronchitis.
Hope this helps, and get well soon!
I have been taking one but maybe sipping on some could help, I'll try it out!
Ryan Hatmaker - Hatmaker Reptiles-
Colubrids and Sand Boas
"Once you get your first snake, you've sold your soul to reptiles. You can try to leave or run away... but they will find you."