Thanks everyone for your replies.I feel a bit happier now,the bowel prep is REALLY horrid and I don't want to do it again if I can help it!
Dusty,a CA125 is a tumor marker which can be high for various reasons apart from a tumor such as endo and ,also can be high during certain times of your period.It should be less than 35 and mine was 55. My doctor has said not to worry too much (!) and that's why he sent me to have the colonoscopy etc just to check everything out.
My sister had an ovarian cyst and a huge fibriod last year and had a hysterectomy so I think it runs in families,I have heard that somewhere I think. I'm OK with the idea of having my ovary out as I've got 2 teenage kids and don't plan on any more.
I'll let you know how I get on.
Denise