Many of us experience problems with raw, zero-carb. Most of us RPDers, I would say, are raw low-carb, eating 80-90% raw animal foods and c.10-20% raw plant foods.In my own case, I seem to do fine for the first 3 weeks on raw, zero-carb, and then swifty start deteriorating, healthwise, with suddenly-loosened teeth etc. etc.
You might, of course, just be experiencing detox, after years of eating toxin-laden cooked foods. A genuine detox is one where you feel very slightly better after the experience than before.