@MrsWinslow - Good luck with your baby dreams! I hope that getting healthy will pay off in the way you are wishing for.
It's interesting what you said about white potatoes being associated with ovulatory infertility. I read recently that they are also the #1 food associated with weight gain over the years! And not just French fries; they were the worst offenders, but even boiled and baked potatoes were linked to weight gain.
Other simple carbs were also associated with weight gain. I've been trying to cut back on them, too. I'll never totally eliminate sugar from my diet, but I'm trying to make it more of a special occasion thing. I think my taste buds are slowly being reprogrammed to not expect so much sweetness.