Afraid of Chemo-side effects

Hello Everyone, I have breast cancer. Stage2 Her2 weak+ 2.5 CM. I had a lumpectomy 6-6-05. And not yet chemo and radiation. I hear so many bad things about the chemo.Did anyone have doxorubicin,cyclophosphamide(CTX),fluorouracil(5-FU) treatments, and how did it go? I'm afraid of having heart damage,or any other organ damage.Anyone out there have any of these problems? It would be nice to hear from you soon. Thank you, and God Bless You !!! Mary Ann