Any advice you can give me for my first time flush?

I'm doing my first Liver Flush tonight and I'm a bit nervous. I've been preparing it for about 2 weeks now and I think I'm ready. The thing I'm kind of worried about is how it will effect me the first time because I tend to get paranoid when I consume certain things. Like for example, if I start feeling really funny I'll think I'm dying. lol I'm very weird when it comes to this kind of thing and I don't want to end up freaking out in the middle of the morning. Just making sure that this Liver Flushing is safe and is there any other kind of side effects? This should also be done every two weeks right? I'm just using grapefruit, Epsom Salts and olive oil from clarks book. Thanks for any advice!!