Biga Fail...

So I decided last night I wanted bread for today, and didn't have "time" to start a levain from my NMNF starter.  Biga! I thought, so I mixed it up with some dry yeast and went to bed.  I got up this morning, and it's flat.  Yeast expired in 2018...should have looked at that.  Apparently I don't use yeast much. In an effort to save the flour (which I have to import and don't want to waste) I mixed some NMNF into some warm water and worked it into the biga.  I'm really hoping this will work.  It'll be kinda like a poolish right?