I also had trouble after taking the Epsom Salt just like you said. This is the Clark-flush we're talking about. You can try other methods with no epsom salt, please check out this web site, it has at least 3 different methods listed. I also suggest a preparation for the flushes cure that has helped me before my third flush: kidney cleanse, parasite cleanse and Chinese herbs from www.sensiblehealth.com - I actually visited this lady's store here in Toronto and that visit was an eye-opener.
Do not give up and try to customize your protocol based on your symptoms and progress. It takes time and patience but it's worth doing it. It's YOU who can help yourself the most, all these methods, herbs and information is there to give you only the tools.