Fosamax and sudden dizzy spells

Have taken Fosomax for almost 2 years due to "some thinning" in hip and family history (mother has osteoporosis and is on Fosomax). In past 6 months to a year, have started experiencing unexplained bruising on hips and thighs and buttocks (when I know I haven't bumped into anything), pain in my knees, hips, right wrist, hand and elbow (the most severe), right shoulder, and the bottom of my feet, difficulty and pain standing and walking after getting out of bed or out of a chair, very stiff and painful knees after bending or squatting, sleep disturbance, acid reflux, occasional sudden dizzy spells for no apparent reason, ongoing weight gain especially in upper and lower abdomen, fatigue, shortness of breath (which I thought was due to the extra fat around my middle, but who knows?). I am only 53 and take no other prescription medicines, and am otherwise healthy. I have my annual physical in a few days and am stopping the Fosomax to see if the pain and other symptoms subside.