DS is 3 months old, and I've been reading that he should still be getting about fifteen hours of sleep per day. He sleeps really well at night - usually a full stretch from 8 pm until 1 or 2 am followed by a stretch lasting until 6 or 7 am - but during the day, he is usually up for about an hour and a half followed by a tiny 30 minute nap each time. If we run an errand and he's in the car he usually sleeps longer - about an hour to an hour and a half - but as his normal day stands, he's usually getting only 12 to 13 hours of sleep in a 24-hour period. Is this cause for concern at all? Should I just let him set his schedule as he has it, or should I try to get him to sleep more during the day? And if so, how? We already have a dark blanket pinned over the window to block the sunlight during naptime, but I'm not sure what else, if anything, I should do. Thanks in advance for your help!