Binding Problem

I'm discouraged and somewhat worried. Last night, not going out or anything but just for the hell of it, I tried chest binding with a wide Ace bandage. I didn't pull it super-tight, but my back started hurting before I'd even finished wrapping. I took off the bandage right away, but my back kept hurting and still hurts this morning. OK, so my back pretty much always hurts, but this is in a different area. The pain is usually centered in my lower to middle back (the dreaded L5). This is in my ...