Two things. 1) I agree with the post above about having your meds checked. I fell once for no apparent reason. Turned out to be the combination of blood pressure and pain meds I was taking. 2) My daughter was feeling like she was going to fall down, and nearly did several times. Turned out she was, to quote her doctor, "catastrophically low" in vitamin D3. After therapeutic doses for several weeks, she was fine. I know this is a long shot for you, but I wanted to share on the off chance it might help.