You are not doomed. I cured my Candida after a very long treacherous haul back in the 1980s. I was on a very strict program for about 2-1/2 years before I cured it. At the beginning I could only eat 9 foods in the whole world (I had no choice because everything else came back up). Thank goodness that didn't last long and gradually I overcame the Candida and turned around all my sensitivities and food allergies
I went on to help others by starting the Candida Support Group in Edmonton, Alberta, Canada and have also written Candida Programs that I handed out to many people over the years. Now I have an article "How to Successfully Overcome Candida" at www.nourished.com.au/ - use the search on Candida to get my 2 part article.
Check out Hering's Law of Cures (see url below). The basic law is that it takes one month of natural healing for every year you've been unwell. It takes a lot of time, patience and persistence. But in the end you will be well. I found I made some fundamental changes to my eating habits and life style that will ensure I don't get a re-occurrence of Candida however.
One step at time and you will get there.