bea,
my daughter was the sweetest little thing. She slept through the night at two weeks, would smile at us when she work up in the morning, and was generally a gift from above. She is now 3, and has been kicked out of one daycare, has meltdowns at least once per day, has started calling mom and dad a "blockhead", and likes to eat her art projects.
I think perhaps the inverse could be true for you (read: your daughter will be fine)