I am so very sorry to hear this. My heart goes out to you. I had this treatment one time, as well. It was about 8 years ago. I ended up in the emergency room the next day. I had some of the same symptoms including bad headache, confusion, nausea, and extreme bone pain. Please take care of yourself and feel better soon. The problem with these medications is that they stay in your system for a long time. And you can have side effects for some time. I often wonder if any rheumatologist would ever put themselves through taking this IV treatment. A year later my doctor wanted me to try Prolia. I was approved but said, "No thank you!"