I just had my second shot and my hands feel like they are going to explode. They are not swollen at all but the pain is unbearable. I don't remember having this bad of a reaction with the first shot. Is this stuff accumlative? Has anyone completed the 2 years of injections and if so, was there a signficant change in bone density? I am lucky since they caught my breast cancer early (I hope) but this pain is unbelievable.