I agree 10 weeks is too early for a 4 hour routine. I suggest you keep a detailed log for 3-4 days of your lo's awake times, cues, feeds, etc. I did this right down to when my lo yawned. I found out he started yawning 40 min after he woke from a nap (almost exactly every time). I went with his cues, put him down for a nap when he was tired, fed him when he was hungry, etc. It made a huge difference, he was so much happier and well rested. He awoke and played in his crib instead of crying because he was still tired. This was about a month ago and now he is 4.5 months old and I have been able to extend his naps and awake times. He is almost on 4 hour easy. Just this morning he got fussy about 20 min before he was "supposed" to go down for a nap, so I took him to the nursery, did the wind down routine and he was asleep within minutes, going on an hour nap right now. I can only imagine the meltdown had I waited because the clock didn't say it was time. Do the log...it will help. Post one if your logs if you would like us to look at it.