Hi Tracey, 
I don't know if soaking the buckwheat or quinoa would offer any benefit. If
that's how you like to eat them, and you don't react to the whey, I guess it
is okay.
 
Any kind of reaction that suggests a food sensitivity, ranging from diarrhea
to cravings for that food (unless your cravings are driven by pregnancy). 
 best wishes, 
 Ron