Just reading this thread and the responses, I highly recommend you adopt and follow a proven low carb plan. Go the the Atkins thread and find a recommended book, use the short book by Dr. Eric Westman, or use the excellent information on the DietDoctor.com website. You need to be consistent with your eating before you can troubleshoot the issues. It takes a while to adapt, but the symptoms you mention are alarming, and if you're drinking peanut butter smoothies, my suspicion is that you're not really eating low carb. When you straddle low/high carb, you're going to experience difficulties. Good luck!