Take extra vitamin C- it helped me fight my cold. However, if you are nauseous, I don't know what it's going to do to your stomach. Buy the ones that say "gentle on the stomach".
Thank you for your advice, you are right.My stomach is fine now and I am taking Emergen-C(water soluble powder), which is supposed to taste like tangerine, instead it tastes very chemical and nasty, nevertheless I push into myself a glass daily. :) Things we do to stay healthy... :)