Hi, R.,
About me: I am a stay-home mom to two amazing, bright, strong-willed little people. My daughter is 5 and my son is 2 1/2 yrs. I'm a Christian, educated, middle-class, loving mom in my early 40s. I adore my husband of 15 years. My children are the light of my life. That's my story.
About yours: Sydney probably does consider this a form of play or simply a means to get your attention. My son went through a stage of hitting. EVERY time, we said "NO! We do not hit in this family." EVERY SINGLE TIME. Children respond to consistency. If YOU are patient and consistent, she will stop.
Fact: children will MODEL THE BEHAVIOR OF THEIR PARENTS. We do not hit. Not ever. I try to remember to treat my children as I would want to be treated. I sure don't want anyone hitting me or screaming at me.
Time-out can be effective, but it's not an easy fix. You have to use it again, and again, and again, and again, and ... eventually it works. Consistency and routine are the keys.
God bless you and your miracle baby!
p.s. I taught both my kids to sign, starting at around 9-10 months. It is SO easy and it can make a world of difference for you and your little one! Much behavior at that age results from frustration in wanting to communicate with you. Get the book "Sign with your Baby" by Joseph Garcia. I promise you will be amazed by the results of teaching even just two little words: "eat" and "milk." Try it.