I know this is very stressful for you but having the CA125 blood test may well be just precautionary.
I had a suspected ovarian cyst but I was told I should have a CA125 blood test. I was concerned by this but all turned out OK. The CA125 test is not a definitive test and can be raised due to any one of a number of causes not just for cancer. I believe the test is considered normal if the score is under 35. Mine was 19 and when my cyst was removed it proved to be just a normal cyst (fluid filled).
I hope this helps you to relax a bit