Now it's just time to wait and see. I had blood drawn. I have continued dropping weight and am now below my preteen weight (I'm turning 40 this year; my preteen years were a long time ago). My ribs and backbone protude grossly.
I am actually relieved that the blood has finally been drawn, because now I won't have to speculate anymore. Soon I will know what's going on, and be on the road to fixing it. My followup appointment is next Thursday.