stingy smiles

is anoyones little one stingy with there smiles my baby is 14 weeks she will smile here and there but for the fort the most part is little miss serious.. I’m a first time mom and I hate to say this but I just have this feeling she’s not “normal” she brings her hands midline tracks objects has occasionally coos lifts head during tummy time but I just have a feeling soemthing is off i can’t put my finger on it is this normal first time mom anxiety ?