
Hi,
First of all, get some good worming tablets from the vet - I use Drontal Plus with my dogs. Puppies need worming about every 2 weeks till they are 3 months old, then every month till they are 6 months old, then every 3 months for the rest of their lives. Cats carry a different type of worm to dogs, so your cat will need a different wormer - again, your vet will know what's best. Pet shop wormers are no good - they simply aren't strong enough. Worms aren't passed in saliva - only worm eggs in stools. The eggs need to be exposed to the air for about 24 hours before they become infective, so if you clean up carefully after your pup, then wash your hands, you will be fine.
About the crate - why do you need to lock it? Just having it shut for a short time would be fine, I would have thought - many people never shut the crate door at all!
Relax, and try to enjoy your puppy - what is her name, and what breed is she?
:)