Unless he's on someone or in the carrier, my 9 week old son will not nap more than 15-20 minutes at a time. After that, he usually startles himslef awake. I've tried sitting next to him and patting him while he transitions into a deeper sleep, but it's as if he never does. He still startles himself and will sometimes calm back down only to repeat again, or he will wake up and I can't get him drowsy again. I've gone through this for over an hour, with him continuously stirring. I've also tried swaddling him but it doesn't help. At first I though he would grow out if it, but at 9 weeks, I'm starting to wonder what's going on.