1st flush

Hello, I'm doing my first flush this week with my naturopathic doctor. I've finished day two of my pills that she told me to take. On day 4 I drink the olive oil and go to bed. I'm really worried about doing this flush, I'm scared that I'm going to be in a lot of pain. Do you experience pain after drinking the olive oil? Can you sleep after taking it? I do have a lot of Gallstones but they're no bigger than 3mm, my naturopath said that was good, that it's like gravel. If anyone who has been through this could let me know kind of what to expect in the way of pain, I think I could prepare better mentally. Thanks Vera.