I've learned of a Facebook Page focusing on Prolia related issues. Here's a link to it:
https://www.facebook.com/search/top/?q=prolia%20side%20effects%20and%20complaints%2C%20effets%20secondaires%20et%20plaintes&epa=SEARCH_BOX
This link should get you there and you can have a look at what others report.
I have no way to vet this for accuracy or for the appropriateness of suggestions offered, but it still may be worth a look.