One ovary, extreme pain on that same area after ovary was removed

A
I had an ovary taken out due to an "excessive reproduction" of cysts on my right ovary ( words from the VA ) in 2013 my right ovary was removed but a few months I've been experiencing extreme pain on that side where the ovary was.... 
Has anyone been in this same position and know what could this possibly be ? I'm to the point of tears 😢