OK now take a deep breath.... don't forget to exhale though :wink:
Walk away from it for the night and tomorrow everything will look clearer.
You mentioned the seam allowances, hmmm could that be it? Do you still have leftover fabric from the houses? If so can you add a row to them? Maybe? :?
It will be ok. Your a smart cookie and I think with some rest you'll figure it out.
Faith :XD: