I might second the circulatory diagnosis. Plantar Fasciitis engages primarily the beginning of the heel (kinda just past the middle point of the bottom of the foot), while circulatory problems can make the entire bottom of the foot hurt like you ran a mile on concrete in bare feet. My feet used to be so bad it was all I could do to hobble from the bed to the bathroom until they warmed up sometimes.
Chani, is the pain you're feeling all over the bottoms of your feet, or just in the middle heel part?
I have PF, too, and, though the ache is very different, they both stink.
Losing weight, exercising and eating better has definitely helped. Especially the losing weight part (25 pounds so far). When I was first diagnosed with PF - in my right foot only - the army docs wanted to do surgery due to its severity (I, too, waited a loooonnnngg time before seeing them), but until I simply can't walk on it anymore, there's no way I'm letting anyone cut into my foot.
Currently, both problems are pretty much managed. My feet never ache in the mornings (what a blessing!), and my heel only acts up if I stay on it a terrifically long time.
Whatever the diagnosis turns out to be, I wish you the best, Chani! Anything that endangers our ability to dance is a big deal!
A.C.