First thing that I would recommend is that you relax and avoid focusing on every negative aspect of your family medical history. The menstrual issues are not uncommon - many, many, many women have irregular cycles and there is nothing wrong with them, according to Western Medical Testing.
Then, I would suggest that you check out the following curezone.com forums:
If you have access to a health food store, look for cayenne pepper supplements - I have read a number of articles that suggest that cayenne pepper is wonderfully effective in preventing many diseases, particularly cancer.
The most important effect that you will have upon your own health is that you maintain positive energy within your heart and mind. That you are willing to take responsibility for your own health is a GIANT leap that most people refuse to make. Best of luck to you!!!