Just a word to encourage you a bit. Don't beat yourself up, blame yourself, or shame yourself. These will add to and compound the issue.
Those of us who have been through it can reassure you that it will pass, that this is only for a season in your life. Keep working toward a healthier self-image and the bedwetting will miraculously subside and be left in your past.
I have taken to the stand-up comedy stage to educate other male survivors and those who try to love them. I blog about my isolated religious upbringing where physical and sexual abuse were commonplace and I serve as a facilitator of a weekly support group for men who have suffered sexual assault.