"Phases" are just normal development. What I've found helpful with all of my children is reading a human development book to see what is normal behavior. And I seem to forget with each one, and they're different anyway, so it has always been helpful to read with each child and every so often.
Rest assured, your daughter's "behavior" is normal and actually healthy. She is trying to become independent and expressing what she doesn't like. It is much better than a child who is willing to be, for lack of a better word, "dishrag" or "doormat"--especially in today's world.
Regarding the nap--all of mine gave it up between 2 and 3--very, very typical. One of my daughters had the same situation with preschool and didn't want to nap at naptime. In fact, it was very traumatic for her. She is such a sweetheart--and was then, but she was so uncomfortable with naptime it caused her not to want to go to preschool. From our adult mind it seems silly, but not to theirs. Anyway--the book idea someone else suggested is what worked for us.
One other suggestion. . ."fear" never works as a good parenting tool (i.e. punishments which are really threats--taking away important things to them--like the candy--physical things like spanking, etc.). I say this from plenty of experience . . . trust me! What I've found that works the best, and feels the best for sure, is using "love" as the motivation. That means you are wanting to understand why your child is behaving that way (and knowing that our children are inherently good and special--but not always their behavior). It takes more time this way, more of your personal time. It means you're by their side modeling good behaviors for them. And, it means you're interested in what their needs and concerns are, which takes time to talk them and find out, or time through being patient to gain their trust again through loving them and not threatening them.
Whatever you do, still picture as the sweet, loving girl she is. She's stumbling now as she's learning and growing (and who of all of us doesn't???), but if you change your way of thinking about her you will be surprised to see she will actually change, too.
Stay positive!
J.
With