Hi,
Yes, it is possible to have breast cancer at a young age (it has even occurred in a 2-yr-old) but it is very uncommon.
Still, it is important for anyone to see a physician for a clinical breast examination, and other tests if indicated, when changes are noticed in the breasts.
Lymph nodes can be enlarged for various reasons that have nothing to do with cancer, such as an infection somewhere in the body. Although it is unlikely you have breast cancer, the visit to your doctor could help diagnosis what is going on and what what treatment might be helpful.
Meanwhile, I would suggest you visit the American Cancer Society Website, and read an article which has comprehensive information about breast cancer (types, risk factors, etc.) It also specifically addresses the Internet, email, and now apparently Facebook, rumors about antiperspirants causing breast cancer, saying there is little evidence to support such rumors. and cites a large study that found no increase in breast cancer in women who use underarm antiperspirants and/or shave thier underarms. Here is a link to
that article:
http://www.cancer.org/acs/groups/cid/documents/webcontent/003090-pdf.pdf
Best wishes,
bluebutterfly
p.s. MedHelp has information relevant to your question, in the form of a slide show which "busts" 17 myths about breast cancer. Click on the link below to view it:
http://www.medhelp.org/cancer/slideshows/17-Deadly-Rumors-About-Breast-Cancer/52
A note about anti-perspirants. Some women can't use them and I am one of them. They caused red bumps that itched. I think my pores were clogged. I gave up using them.