Honestly Jojo don't worry. From having the older two, every baby is different. If I showed you the video you would laugh. She was born 17th feb, so 2 weeks older isn't she?
I had one baby who was properly talking as in whole conversations by the time he was 18 month, then the next was approaching 3 and couldn't string 2 words together. I must admit I was getting quite worried, but the funny thing is she's now the smart one.