i think i'm ok now.
how likely is it the soy? not very. i've been drinking soy for years and the coffee has soy and isn't making me sick.
the yeast is supposed to be dead. it's just fortified bread. it seems unlikely. and, the eggs didn't make me sick - and had yeast.
but, the yogurt? that's maybe not so crazy.
when i make the pasta tonight, i'll take the yogurt out and see what happens.