When my well under 30 year old vegan, super fit daughter had stage III breast cancer/double mastectomy/chemo/radiation, and she was treated by the “dream team” at a top tier medical center. I learned a lot about the different chemo drugs and their possible short and longterm side effects. Keep in mind that everyone is different, and reacts to drugs differently. BTW, you are fortunate that none of your lymph nodes were removed, so you avoided lymphedema.
Not everyone experiences the more serious side effects of Xeloda, which includes Hand Foot Syndrome (HFS), which indeed is blistering of the hands and feet.
Are you in the 1-2% of patients that experience the more serious, rare side effects from other medications? If not, it’s possible that you may not experience HFS, and may instead get the common side effects.
Keep in mind that a common side effect is anemia. In the longterm, Xeloda may cause serious hematological problems, WBC, RBC, bleeding from abrasions, which will affect your energy on the camino.
My daughter felt well enough by the 2-year mark to rebuild her strength and stamina. She had been a longtime athlete, and knew her body well. She had trouble for a while in regaining her muscles and cardio. She said that eschewing her decade-old vegan diet, and instead eating meat(!), helped tremendously for her to recapture her strength and stamina. She is a breast cancer survivor. She still loves eating meat. (Her words.) Hope this helps.