Bananas are very high on the glycemic index and are weight gainers, containing a lot of sugar.
When you stop eating sugar, the candida in your cells begin to crave anything that will quickly restore the yeast levels. Yeast is formed in the cells from sugar, and yes, even fruit sugar when it's high glycemic.
I would recommend doing some electrolyte drink that is flavorful (Crystal light, Mio, Powerade zero) and drink some tea that will help to kill the candida in your cells so that your sugar cravings subside and you don't have another break down.
Home brewed yogi tea is a great option for this. Also, add 20 drops of black walnut hull tincture to a cup of tea or smooth move to release candida faster and more effectively.