Dear Hershey1, Some chemotherapy medications given for treatment of breast cancer may cause damage to the ovaries, resulting in menopausal symptoms or menopause. Many pre-menopausal women retain or recover ovarian function and their periods after treatment is completed. Generally, as a woman ages and becomes closer to menopause (chronologically), the more likely it is that she will experience menopause symptoms during chemotherapy, and the more likely that menopause will be permanent.
Regarding symptoms of menopause such as hot flashes I am referring you to the website Chemocare.com (www.chemocare.com) Under the topic of managing side effects is a document that discusses menopause and chemotherapy as well as hot flashes (here is the direct link: http://www.chemocare.com/managing/menopause_chemotherapy.asp to that area of the website) There are several suggestions for help with managing side effects associated with menopause.
Regarding risk of recurrence it is difficult to speculate without all available information but your oncologist is in a good position to estimate that risk.