Very light overy tenderness after tubal ligation

So I had my tubes tide and a c section two months ago. And after I had my first period I have been having tenderness on my right side. It was really tender during my ovulation week. Now it has subsided quite drastically. But I still feel very slight tenderness when my bladder is full or when i push up against something. But no pain during sex no bleeding. It doesn't hurt but I still feel slight pressure. I went to my obgyn they did a ultrasound and a pelvic exam they said everything looks fine no issues that they can see. Has anyone else had this after a tubal ligation and if so how long did it last?