I was too young for menopause, as well. I did, however, take the hi-dose birth control pills for several years, then lower dose ones later. Chemo put me in menopause at 36, and it was not a pleasant experience. There have been a number of studies done on using SRI's to treat menopausal symptoms without having to use hormones.
I think it's fairly obvious that there is a connection. If you're on hormones when you're diagnosed with breast cancer, the first thing they tell you is to STOP taking the hormones. If the hormones haven't caused the cancer, they have definitely fed it.
Keep up with your research, and good luck.