I am 75 years old, I was prescribed Fosamax about 7 weeks ago, ...

I am 75 years old, I was prescribed Fosamax about 7 weeks ago, one once a week. After taking it for about 4 weeks I developed a really bad back pain, I went to the doctor, he had x-rays done, result, I had a crushed fracture in my 11 th vertebrae, how I did it I do not know, I was in a lot of pain for several weeks, I still can't sit up without support. I have also been suffering stomach pains and over the week-end I had a very severe attack of Crohns, I seem worse off for taking Fosamax ?