What To Do When You're Out of Spaghetti Pasta

Since Scott's paydays have changed from the 15th and the last day of the month to every other Friday; it has made a hiccup in my grocery shopping.  I have always shopped twice a month, on payday.  In between, I run after fresh produce or milk.  It's just a 40 year old habit.  It's just that he was paid the 31st and I was expecting to shop again on the 15th.  But, no, he was paid again on the 8th, tiny amount, and then not until the 22nd.  I forgot about the change.
I am running out of some staples.  No problem.  Just substitute.  After all, one pasta is just another in a different shape, right?  Right.  Pasta is just flour and water, kneaded, and rolled thin or thick.  The shapes we buy at the market are all pressed through a die.  Okay, so I had 1/4 lb piccolini, 1/3 lb medium shells, and 1/2 lb macaroni.  With the sauce, it is still spaghetti.