Same story. DEXA scan said -3.6 in, I think, '98. 11 years of bisphosphonates, from Didronel to Boniva and back to Actonel, made very little difference. Had several really bad falls without breaking any bones. Excess calcium excretion and deficient Vitamin D metabolism corrected made little difference to the DEXA scans. Stopped taking Actonel because of excessive muscle cramps in 2009. 2011 DEXA scan showed -3.4 for one vertebra and little better for the others. I lift weights 3 times a week and swim for 1/2 hr afterwards. I suspect bone density is not all there is to bones. As my last physician pointed out, that's the only quality we can measure "repeatably". I use quotation marks because if you move and/or change labs the repeatability depends on how closely the calibration of the diverse machines matches.
Stop worrying about it. Don't climb on ladders or take other risks of falling, watch where you step.