What are some good natural health websites?

I have never paid much attention to health before. I’ve always been a really healthy person without even trying and I pretty much never get sick. But yesterday I went to the dentist, and he says I need a root canal. I guess my immune system isn’t as good as I thought it was. I have read that a tooth with a root canal will leach bacteria into my body which can cause a ton of different health problems and ruin my immune system. Now I feel I have to be extra careful about my health. But there are so many different opinions, its really confusing. So what are some good websites, books, magazines to help me start educating myself?