@annar, thanks so much for posting. From my reading there isn't any known way to rid your body of Reclast. Some patients with extreme reactions like yours are given low dose steroid even as steroid can affect bone density. I have read that low dose steroid is less harmful to your bones than the inflammation you are experiencing.
Antihistamines would help with the allergic part of your reaction. Its usually tylenol for the pain, but you want to watch kidney function.
Though Reclast is said to stay on the bone for ten years, it doesn't continue to cause the effect you are experiencing now while it does continue to prevent fracture.