Anyone have COPD and had to do Reckast? What were side effects/how bad

I have COPD, 69 female had l4l5 fusion, 7 mos out and have osteopenia on Evenity, have to do Reclast in February soon: I'm scared to death it says worsening symptoms and breathing problems, possible respiratory failure with having COPD pre existing, MAKES SYMPTOMS WORSE ALSO HAVE IMMUNE SYSTEM MESSED UP; SEVERE ALLERGIES CAUSE ASTHMA, AND HAVE GASHIMOTOS THYROUD AUTOIMMUNE. DOCTORS ARE NOT GOING TO KNOW HOW SEVERE MY immune response could be till the drug is given. I DONT WANT TO DIE FROM RESP FAILURE. ANYONE HAVE EXPERIENCE WITH THIS NO MATTER HOW TERRIBLE OR NOT SO BAD I NEED TO KNOW PLEASE.