Marcy
First off if you are worried about ovarian cancer it is extremely rare on both ovaries. If it were on both ovaries it would have spread more and be clear on the ultrasound that it was cancer. 98.6% of cysts are not cancer. A normal woman has a 1.4% chance of ovarian cancer in a life time. It is lower if you are younger. If you had the BRCA gene, women in your family with early ovarian cancer the chances are 20%.
If your Gyn is doing a cystectomy that is great. Many take your ovaries which is not good. It is easier to take the ovary out. Doctors now know ovaries are important to your over all health. They used to think ovaries were just for having babies. They regulate many things in the body.
It looks like you might have endometriosis which could make your CA125 higher. Endometriosis is not cancer and does not lead to cancer it is basically an over growth of tissue.
You can go to a GYN oncologist they don't just do cancer but complex surgery. Many will just take one or both ovaries because it is easier than removing cysts. Or you can get a second opinion with another Gyn. You have time.
I have late stage ovarian cancer and I would not tell you this if I thought your doctor was not a good doctor. We need more doctors like yours. Most doctors will send you to an oncologist in a heart beat if they suspect ovarian cancer. You can ask your doctor why she thinks it is not cancer.
Alex
I forgot to add that it says "complex"