First, she sounds like she is doing great. Second, for sure get her evaluated by Early Intervention.....these therapist know what to watch for and will help YOU and your baby. Even if everything is fine, anybody can benefit from therapy.
Unfortunatley (and I know you have been told this before) this is kinda the thing that you have to wait and see about. Being a mom.....that is the HARDEST thing to hear becuase you just WORRY. My son has a few delvelopemental delays, and the dr's always told me that we would have to wait and see what happens. So, basicly, I just had to wait and see if his delays were due to bigger issues (autism, etc) or if he would learn to overcome them. IT WAS TORUTURE to wait!!! I did all I could to help my son and teach him. I needed to feel like I was doing SOMETHING!!! And......now, he is FINE! He is advanced in many areas, and I am SHOCKED at how far he has come in such a short period of time. So, my advice is take the time and energy that you are spending worrying, reading on the internet, etc.......and interact with your baby, read to her, sing to her, do patty cake type things, play with her, bring her around other babies, encourage crawling/walking/standing, etc. Focus on that instead!!!
BTW.....My friend had a microcephaly baby, and her daughter is beautiful, bright little girl.
Turn your worry into action....best wishes to you and your daughter.