Another Diagnosis

Finally went to Dr about pain in lower back and hip locking,sent for xrays. Well xrays show severe ddd, which I have known about for years, but now I also have OA of the spine and hip. Oa is bad enough in hip that a hip replacement is needed. I am 48 years old and hip replacement surgery scares the life out of me,the thought of saws/drills/mallets changing parts of me is not a pleasant image. The orthopedic surgeon my Dr is sending me to has a long wait list and the surgical wait list here is long so I probably have 1-2 years before surgery which means 2 years of stressing/worrying. What have I done in my life that was so bad that I am now being burdened with all these health/medical issues? I thought I was living a good life, treated people as I would want to be treated/worked in medical field 26 years nursing people/don't drink to excess (3-7 drinks of wine/week)/don't do drugs. Guess there really is no explanation/answer why, it is just the way life happens.