tail bone pain

Dear Dr Davidovitch, I've been suffering from pain in my lower back (tail bone) for over a year. I did an xray and the osteopath told me it looks like my tail bone is too bent. I have done external manipulation as recommended by the osteopath but it has increased the pain and now i suffer not only when im sitting but when im laying down as well. He is now suggesting internal manipulation via rectum. I would love to hear your opinon on internal manipulations. many thanks for your help