Has anyone here had experience with a younger mare that had ovarian cysts or tumors? What were the symptoms and what did you do to resolve it?

I have a 7 year old mare that hasn't been off her cycle for almost a year. She is very uncomfortable under saddle and wants to buck or kick out. She rail swishes HARD! She's had KS surgery and recovered so I know it's not that. 

If it's not one thing it's another it seems ??