Hello, I am an 82 year old female with severe osteoporosis of the spine along with curvature of the spine, I weigh only 83 lbs and cannot gain even 1 ounce since my husband passed away in 1992. For the last year or so I have experienced shakiness in my knees and I feel unstable at times in my gait when walking. Is this something that I can address with my GP or do I need a specialist? Thank you. Mrs. Johnson