Just a thought: you know you don't necessarily need a Belgian visa, visa
from any other Schengen country is just as good.

Umm, I know this but as I am going in Belgium I think it's better continuing with this embassy.

Also FOSDEM guys just gave me some hope:

The 27th should be plenty of time.  Usually, a Schengen visa can be
issued in about five days.  We have evidence of them being issued speedier.

You also have more documentation than you need, so there should be no problem.

Good luck.

 - Philip