It sounds like it could be adhesion's if not a cyst. Have you had a recent ultrasound done?
It IS possible that its ectopic, just not likely. Could also be you're gall bladder. However, I would go to the doctor right away, just in case it is ectopic. If it is and don't get treatment you can have major serious life threatening problems. Better to be safe than sorry. Good luck to you.
Its not your appendix thats on the right side. And i dough your pregnant unless the procedure was done poorly. Sounds like you might have an ovarian cyst or fibromyalgia -The muscle of the thigh and butt are very large, and so the metabolic matter that settles into this area gets really deep into the muscle. When you are cycling in that area, it becomes very, very painful and inflamed. It is common to have the same metabolic matter settle along the ligaments in your groin.