I'm Aliza, a BC patient, and the site's unofficial Medical Librarian. Med Librarians answer questions, but usually stick to non-medical ones, as responding to medical questions constitutes "practicing medicine sans license" which is considered a bit illegal, so we tend to shy away from that...;) (I can't tell anyone even if I know the answer). We do however refer folks to docs, hospitals, institutions, agencies, books, websites, media, etc, and research when requested or required.
I came on the site in my professional capacity (rather than just another patient) because I felt I had some unique things to offer. I am permitted despite what I mentioned above to speak about my own experiences as a Cancer patient and those of friends and family with Cancer (we number too many).
The person who can truly answer the question you ask with any validity is your oncologist. She/he is the person who has all of the reports/scans/data from your mammography, your surgeon, the pathology report, visual information, etc. and to ask folks on this site may be comforting but the best that they might be able to do (minus the few who are medical professionals) is guess - underline guess (despite the fact that we know you're Stage 2 and your sentinel node was clean (congrats-that's good, btw). I think you'd want to really get a professional to give you her/his opinion and then come back to this site for support. You may even want to get a second opinion from a different oncologist at a different treating institution (your insurance very likely covers this). I'm sorry if I sound like I'm trying to discourage you. I'm not. But I know the other side of medicine as well since my former husband was a physician (not something I'd list on my resume)...;)
You may wish to ask your Oncologist if she/he considers you a candidate for Oncotype genetic testing. This is really the litmus test (if the Oncologist determines that you might be a candidate for the possibility of escaping chemo) to see if that can be a reality. Otherwise, she/he has the experience (as long as you trust and like her/him to determine the course of action that's best for you (again, verifying with a second opinion is often a very good idea).
I know that this isn't the easy answer you wanted to hear, but I think it's probably the best answer for you, and that's what everyone here would ultimately wish for you (since we're not M.D.'s)
I hope you get the good news you're seeking. If you have any questions, please feel free to contact me here or email me offsite.