Extensions Exist!

Most professors are willing to give you some slack (unless they look and act militant or lack a sense of humor and basic facial expressions). While teacher assistants may not always be as compensating, most professors will hear you out since they will be more willing to read a late paper than an illegible one made from a printer with only two drops of ink. But as usual, don´t abuse the privilege, and prove that you deserved that extenstion.
**Note: Always discuss a potentially late assignment with your instructor before it is late.