I have a lovely 3 and half month old baby who generally sleeps well for a baby but she now seems to fight sleep. She sleeps in her cot at night and for most naps except if we are out for a walk she sleeps in her push chair. When going to sleep in her cot I rub her tummy so she know I am there and this seems to calm her down but she often thrashes around and crys a bit until she starts to settle. Her first nap at the morning is the worst and she gets it takes her along time to get to sleep. Apart from if I am pushing her in her push chair she has shorted her naps and seems to be getting over tired now. Is there anything I can do differently?