Hérnia 3 anos pós-hemicolectomia direita

I had a Right Hemicolectomy 3 or 4 years ago - which went very wrong with a lot of complications. My incision continuously ruptured - resulting in leaving the 3 inch surgical wound open and allowing healing without sutures. This is when the fistula was discovered and a stoma bag placed which remained for several months until the wound finally closed. As a result there is what feels like tissue thin skin at the incision site. Since then, I have had a lot of experiences with either frequent bowel movements and occasional constipation. I discovered a large lump the other day when bearing down trying to have a BM, about the size of a fist. I saw the doctor today and she believes it is a hernia. Has anyone else had this type of experience? I am awaiting a scan now. They did the R Hemicolectomey because they found a large tumour during an appendectomy. That was benign, however this situation has filled me with cautious concern. Any advice or comments or shared experiences would be greatly appreciated. I am a 58 year old female, and the lump is where my appendix would have been, roughly. Thank you!