Don't panic! :D My bitch had puppies on day 57, and all were fine :)
Is she starting to nest? Not all bitches do. My first bitch just sat beside me, then ran to the front door, giving birth mid-run

The puppy bounced into the water bowl ;) It was fine. Mum thought she'd done something wrong and wouldn't go near it until the 2nd and 3rd were born within 5 mins of one another. Oh the joys of breeding ;)
Good luck for the next few days, just keep a close eye on her. AND TRY TO GET SOME SLEEP :D