No I don't think this is the end. I think what you experience is a healing crisis. Consider taking algin and some natural antidepressant like st.johns wort can help you. I had a similiar experience and still recovering from this. You will get better but you have to be patient. St. Johns wort has helped me a lot in this difficult situation. Without the mood lifting and calming effects of it life can be terrible during detox. I know that is very difficult but don't spend the whole day thinking about your illness and the mercury in your body. It will drive you crazy because you can't do anything about it. You are getting healthier but it doesn't feel like that..