Be prepared! This unfortunately is part of the deal of working OB. At least once a month we have mock drills on different situations, post partum hemorrhage, infant abduction, seizures, prolapsed cords....
Hopefully, you work in a unit where everyone pitches in. Do you have an OR in your unit? If so, go into it every once in awhile, get familiar with instruments.. Have your scrub tech go back with you, they are a fountain of information, tap in to it. Talk to the doctors, anesthesia, RNs with more experience.
A dirty instrument is better than no instrument, that's what antibiotics are for.
Needless to say, document, document, document. Not that it will bring back a mother, but it will keep you out of court.