Guinivere, tell your doctor that Fosamax is too slow, Prolia is too dangerous and with your numbers you need an anabolic.
Of course, you don't have to decide today, but your doctor is afraid you might fracture. It's good that the office called you right away and good that she is concerned.
Windyshores gives the best advice and has the most experience. I would cross off Evenity, but it's better than the two you are offered.
You should call them so they can get started in case there is a slow-down with insurance.