How your doctor can help
You can, and probably should, also go to your doctor. Your health provider will most likely have resources available to reclaim your sexual function after surviving ovarian cancer. They may also lead you to other resources which can help, such as the American Cancer Society.
There may also be certain types of reconstructive surgeries which can assist you. Going back under the knife may be daunting, especially after a long fight with cancer, but sex has such a strong impact on quality of life that the temporary disruption may very well lead to great rewards.