I left a loaf (Sourdough with durum flour) to rise overnight in a banneton on my windowsill (it was quite cold there), then turned it out to bake, and it smacked down onto the sheet and flattened. Can I re-shape it and stick it in the fridge to rise again? I mill my own flour and used my last sprouted durum, I really can't throw this dough away! I'm so upset! 

Perhaps i can knead in some more starter to make it rise again, or can I just re-shape it and put it in the fridge to rise again? 

Heeelp! 

Milla