Hi There,
at age 30, it would be very unusual to develop ovarian cancer. Usually the ages that your relatives developed cancer can be a clue to when you become at risk for cancers.
Usually screening should start 10 years earlier than the age that a relative developed cancer. So if your great grand mother had ovarian cancer at age 50, screening should start at 40. This is especially true for mammograms to screen for breast cancer.
If you have a family history of cancer, you should ask your doctor about genetic screening. If you have the gene mutation for BRCA 1 or 2, that is a reason to consider prophylactic surgical removal of the ovaries and fallopian tubes and also to consider prophylactic mastectomy.
Unfortunately there is no good screening test for ovarian cancer.
As far as your gyn symptoms.most cysts are related to ovulation. It is the normal job description of the ovary to make cysts that come an go each month.
Abnormal Bleeding should be evaluated by checking a pregnancy test, hormone levels such as thyroid and the milk hormone prolactin, and to do a biopsy.
Persistent pain may be related to your bowel disease but unexplained pelvic pain may be evaluated by diagnostic laparoscopy. The most common gyn reason for the pain you describe is the benign condition called endometriosis
it sounds like you are being evaluated very well
best wishes