Hi! I have had severe back pain that started two days after the injection. I am on day 4 of severe back pain. Doctor says if it is from the Evenity it should pass. If it is from Evenity and does pass I may consider one more if it passes soon. I don't think I can do another if this lasts for weeks or months. My first injection gave me chest tightness but passed. All these drugs seem to carry the same side effects. Would be hard to choose another if the outcome is the same or worse. Any suggestions?