@snoopyluv345 Keith McCormick, in his book "Great Bones" discusses the crucial need to do CTX to determine the best timing for Reclast. He proposes that if taken too early Reclast may not work, and if taken too late, bone loss may have already happened along with increased fracture risk. The standard timing is 6 months after the last Prolia, he wrote, and instead he suggests individualizing it,

How long after Reclast did you do the CTX? Was it after fasting and early in the morning? Do you have kidney issues that might raise it? I found all these questions were relevant for me and that things are complicated! My own endo doesn't use CTX testing because he says it does not tell the whole story of what is going on in bone. It is so hard to know what to think!

Maybe you could talk with McCormick. Indicate that it is time-intensive. He charges $350 for an initial consultation, I believe, and $85 thereafter for 15 minutes. He works by phone or in person.

McCormick is not a replacement for your doctor and cannot prescribe, of course, but he could give you guidance. You would still need to discuss with your doctor. Do you have an endocrinologist?