I am a cancer-survivor (16 years this coming May) and was preparing a response for you. But I cannot do much better than cofty.
Take everything one step at a time. Don't borrow trouble. Communicate with your treatment team. DO keep your life going. Do look into a local cancer support group and take what works for you and leave the rest behind.
Not all cancers are the same. Not all treatments are the same. Your reaction to each of your identical treatments may or may not be the same.
I went thru 6months of brutal chemo but hardly any nausea. My oncologist was good about giving me meds to control it.
My best wishes for full recovery and a happy life during and after treatment.
-Aude.