Double mastecomy and chemo

Hello Everyone!
I had a double mastectomy 7 weeks ago. I was diagnosed with stage 2A invasive micro papillary carcinoma. My lymph nodes were negative and tumor margins were also negative. My Oncotype score came back as 27 which was a surprise to everyone, given all the negative margins. I will be doing HT, but the oncologist said i needed 4 rounds of chemo. That really caught me off guard. I am still trying to make my decision whether or not to do chemo. Chemo only gives me a 12% increase in non recurrence. Which puts me at 15% recurrence over 10 years. I know chemo can really be hard on the body. What has anyone in this group experienced with chemo Good or bad? I’ve been looking for integrative support during chemo, but no one in my area really offers it. I think my question is, is the chemo worth it?
Thank you!