How can I naturally boost my immune system?

As long as you are having these types of infections, you should limit or cut out whole milk until you feel better, because it can help create excess mucous in the body. 70 % of our immune system fighters are created in the intestines. That being said, you need to be taking probiotics - especially since you probably have been taking antibiotics. They kill all the good flora in your intestines as well as the bad, making your health worse. Go to your local health food store and pick up probiotics and also can pick up DanActive in your local food store. Take both. I don't know what you are eating to replace the proteins and minerals you are not getting by avoiding meat and eggs but you need good quality protein and minerals etc. If you don't know about combining vegetable based foods to create full proteins, get a book called Diet for a Small Planet, by Frances Lappe. It will show you how to create full proteins from food combos like rice & beans etc. Last but not least, take 4,000 mgs. Ester-C daily until you feel better, also a B50 complex, and a good multivitamin. Lots of juices of both veggies and fruits. Herbal teas or just regular tea is good too. Also try no-flush niacin for the headaches.