HI BonyChick, welcome to the board
. No, you should not be freaking out, you should really be happy to see scores like that. All your scores are well in the osteopenia range. Exercise, healthy diet and supplements should be enough to keep those score and even improve them. Are you taking calcium, vit D3, magnesium and good multivitamin? There are other supplements you can take but those are the basic ones to start with.
I like your attitude, don't give into what your doctor says. Do your own research, learn all you can and do what you think is best. Your doctor can advise you what to do, but its your choice to follow his advice of go your own way. I'm not familiar with PBOX90, but have heard its a killer workout. Does it include weights? OH, and BTW...you won't break. You should read the book The Myth of Osteoporosis
(which you don't have) by Gillian Sanson. It's a very informative book loaded with lots of great info that will put things into perspective for you. It also helps many get rid of the scare factor. You can get a copy at your local library or buy a copy. Have a good weekend. take care...phyllis