I have no health problems what do ever other than Overactive bladder and interstitial cytisis

My dad is Diabetic which runs in his side of the family,but cancer mostly runs in my mom side.

Now my obgyn doctor didn't spectic say what kind of PCOS I had,just for me to do the keto diet,if I wanted to have another baby. He didn't won't me on the infertility medicine or medicine that treats PCOS.

I haven't started keto diet yet! Don't really know what to eat and how to start it.

What happens if I never do the keto diet? Will it cause further problems?