From the article link on contributions of surgery to mets risk, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380551/

". . . all tissue trauma, including the sterile dissection carried out by surgeons, elicits a cascade of local and systemic cellular and humoral inflammation which has the potential to capture the cancer cell and support its survival and metastatic growth."

These inflammatory cytokines, prostaglandins, and catecholamines can make fibro a lot worse, at least for me. So if it were me, I'd increase as many anti-inflammatories as possible--beyond prescription & OTC ibu, there's quercetin, bromelain, dietary changes, etc. I'm sure your healthcare provider will have the best ideas.