Skip the carb withdrawal for now, then! Just replace your grains with healthier, starchy carbs like sweet potatoes, squash and the like! And don't be afraid of apples and other fibrous fruit, either. Yes, low-carb is great for many - but getting rid of grains and other garbage supercedes the ketosis quest. Later, once you're used to the new foods, you can dial back the carbs if you actually need to.