3 weeks dieting, no change in symptoms. Why?

Can it take more than 3 weeks of strict dieting to see an improvement in candida symptoms? If anything my symptoms are a lot worse. I ask because I'm not certain it is candida. I have had hives/swelling for over a year and since recently taking a strong colon cleanser I've had eczema, bloating & cramps after each meal. For the past 3 weeks I've been dieting and taking enzymes, garlic and caprylic acid. I actually haven't been terribly consistent with the probiotics.