You absolutely have a strong history unfortunately and it would be wise to speak with a gyn/oncologist. This disease does not discrimate with age either. I agree with NYC Lady, it's never an easy decision to make, but I also assume, that due to your history, that you are agressively monitoring your health as well.
I would speak with a gyn/oncologist, your husband and family and make an informed decision. Best of luck to you.
I am sorry this disease has grasped ahold of your family to tightly.
I suggest meeting with a gyn/oncologist and possibly speak to someone about genetic testing.
Not an easy decision to make. Have you had children? 30 years is a bit young to go through surgery like this unless it is necessary.
Please speak with doctors, etc before making this decision.
Best of luck to you, and good for you for being so proactive.