Nothing to be ashamed about Seven, but it may indicate a medical problem. Rather than sit and worry about it, why don't you talk to your doctor? Or, if that is difficult, there is a very good diagnostic tool at WebMD.com... They might have some insight for you.
If your abuse included anal rape, there is likely a psychological component in addition to some physical damage. The physical injury will probably be much easier to heal than the emotional one. Once you are cleared medically though, you'll know better what you are dealing with and can seek the appropriate treatment.
"That which does not kill us, surely makes us stonger." - Neitsche