It would be helpful to know your age. Your DEXA scores aren't that severe, only your femoral neck is slightly above the osteoporosis range. Take time to do some research so you are comfortable with your decision. Remember that bones change very slowly, so you have time to do this.

Also, after Evenity you will have to go back on a bisphosphonate to keep your gains. Since you already have GERD, oral Fosamax might aggravate that. There's Reclast infusions, so you will want to research them also.

These articles might be helpful: https://prospluscons.com/pros-and-cons-of-evenity/
https://melioguide.com/medications/evenity-a-physicians-perspective/
This article is titled: Forteo®, Tymlos® and Evenity®: How Much Do They Really Reduce Fracture Risk?
https://betterbones.com/bone-drugs/anabolic-treatment/