It sounds like you don’t have a detox plan. When you kill candida it produces over a thousand toxins. Other bacteria, parasites, microbes, etc. die when you try to start reversing your gut flora. These toxins have to be detoxed by your liver and kidneys primarily. When you overdo things, these organs can become overburdened. Then your body will start detoxing via other methods, such as via the skin and/or via the lungs.
I’ve got some posts for you to check out: