It sounds like you are very toxic and the gas from your dental procedure was probably the final straw. I too suffered from severe fatigue, sciatica, aches and pains all over my body and a head fog so bad some days that it felt as though my co-ordination and brain capabilities were zero. I started off Liver Flushing and then Water Fasting for a few days at a time and my head fog really cleared up. I have also changed my diet (lots of veges, fruit, lean meats and cod liver oil) although when I fall off the wagon and eat junk I get very fatigued but when I do this I try to get back on track ASAP. The head fog and sciatica have not returned and I am keeping with it until I have removed all my stones. I still cannot tolerate alcohol and fatty foods but it is better than it was. I keep supplements to a minimum because I believe that they are very concentrated and place too much stress on the liver. Even exercise when you are very toxic can place a burden on the liver. It will probably take quite a while to feel better but I believe you can get well if you make the effort to detoxify and I think that Liver Flushing is a good place to start. Take it one step at a time and focus on how you have improved not on how far you have to go. Good luck!