I am sorry to hear about your pain. I am due to my 4th injection and I also experiment joint pain all over specially at night but I must say that I started to face the same issue before the treatment -my Dexa score was very low -4,7-
I heard that there are many types of osteoporosis and that some are painful. I read that it could be because of a nerve issue: the bone mass is decreasing but the innervation stays the same -these are my own words, sorry for my ignorance. In my own case it is difficult to state what is the cause of my joint pains.
I wish you serenity.