Reclast symptoms and conditions

I have been taking Fosamax for 1 year. A few months after beginning this medication I have been experiencing lower back pain which I never had before. A few times I skipped a dose and seemed to feel better, but the doctor insisted that I needed it because of the results of a bone density scan which showed I had osteopenia. So I am presently still taking it and now with the back pain I am now having abdominal pain and just recently noticed blood in my urine. I may now have kidney stones. I am seriously considering throwing the rest of the Fosamax I have in the garbage.