What type of beverages to drink on the Keto diet other than water?

I got diagnosed with PCOS this passed Wednesday. I have been planning my meals out since then,and sneaking over on Pinterest to get meal replacements options,but anyway.

I have read diet zero cola coca is good on the keto diet. I was wondering if any diet zero drinks are good as in Sprite, Pepsi and so on.

My gynecologist basically wants me to do the keto low carb diet and see if that will help regulate my cycles since he thinks I may not be ovulating. I told him I wanted to have another baby,so dieting is my first stop.

I also ordered me some Pink Stork Supplements that's for women who has PCOS. It says it's good for hormones, cycle regularity and much more. I have read in the reviews on Amazon,that a lot who had PCOS while taking the supplements was pregnant at the end of the bottle,but some didn't fall pregnant,and of course you have your bad reviews.

I told my gynecologist about Pinkstork,and he didn't even know what that is. I was shocked to hear that knowing he specialized in stuff like that kinda,but I'm planning on trying it when it comes in to see how well I do and my doctor did give me the okay on that.