Hi, i have had ovarian cancer (stage 3c by time it was diagnosed) and agree that one high reading of the CA125 is not a diganostic tool in itself. Even now, two years past treatment (all clear!), if my CA12 went up it would only raise an alarm if there was a rising trend, not just one reading. The readings can be raised due to endometriosis, other non related infections etc
That being said, ovarian cancer is VERY hard to detect and diagnose and is usually only diagnosed in late stages. So 'clear evidence' is not always easy to get. Even after I was diagnosed, it took a month of tests (biopsies, MRI's, CT scans etc) before I was staged and given a treatment plan as they just didn't know how extensive it was. So my advice to you is to see the GP and don't be dismissed if you have concerns - push to get real answers if you need them.
Some of the typical symptoms are (but not exclusive):
B = Bloating, persistent unexplained
E = Eating, feeling full quickly, loss of appetite
A = Abdominal pain, changes in periods, unexplained bleeding
T = Talking. Speak to your Dr, Know your own body and its changes and let someone know
I only had abdominal pain which was treated for 18 months as pregnancy symptoms (obv for only 9 of the months!!) and severe constipation (and I mean severe, blue lighted to hospital at least 3 times) before a doctor decided to look a little further!! So, don't dismiss symptoms, but equally don't freak out - early diagnosis for ovarian cancer has excellent statistics. Even me who was only diagnosed at stage 3c is now cancer free :)
So, my advice is to review the above symptoms, go prepared to discuss anything thats different about your body with your GP and push for a deeper scan if needed.
Good luck and try not to worry.