Sucking is a healthy, self-comforting behavior for newborns. A 3-week-old
baby will resort to sucking her own fingers — or yours — as a way of calming herself when she's upset or trying to settle down. You can help your
baby master this skill by leaving her hands bare (no mitts or covers), wrapping her up with her hands near her face, and putting a rolled-up hand towel or receiving blanket behind her shoulders to help round them forward when she's in her
infant seat.
Front Packs and Swings to the Rescue!
One thing babies this age have in common all over the world is the tendency to build up to an afternoon or evening crying jag. This crying doesn't mean that your
baby is missing something, or that you're doing anything wrong — it's caused by her maturing nervous system. Of course, knowing that may not help when you're listening to your
baby wail. Try to stay calm. Rock, sing to, and swaddle your
baby. Carry her in a front pack during the day — it can reduce the duration of the crying later on — and try putting her in a swing; the motion can often help quiet a distressed
baby.
FYI: At this age, babies are demanding and haven't given back much yet, so it can be a particularly hard time for you. Lack of sleep and big changes in the old routine can hit parents very hard. Hang in there! Try to think of this as a brief extension of your
pregnancy. Rest when your
baby sleeps, and be sure to eat regularly.