Even though she was weaned from her mother, puppies should still be with their litter mates until about 9 weeks old for comfort and socialization. Had you not given her the teddy bear she probably wouldn't have slept through the night. Give her lots of attention, but don't pick her up just because she cries or she will whine all the time until she gets her way. Don't take her around any other dogs or puppies until she has had all 3 or 4 sets of puppy shots/boosters (6 weeks, 8 weeks, 12 weeks...?) It's been a while since I've had to deal with puppy shots so your vet will be able to tell you when to have these done.

Here is a great website with a lot of helpful info about dogs and puppies, caring for them, etc.

http://www.canismajor.com/dogs