My Rheumatologist Wants To Start Me On Prolia. I Stopped

my rheumatologist wants to start me on prolia. I stopped taking Actonel in January after taking it for 5 years. My physical therapist thinks I should wait for six months to see how therapy and diet change could address the bone problem. He thinks I should study the side effects very carefully. My doctor said the only side effect would be low calcium levels but I see many more serious potential side effects that I would not want to have. Do you have any advise for me?