In your sleepy state, it's natural to wonder why your 2-week old is crying. And of course you wish she could just tell you what's wrong. Without words, crying is the only way your child has to communicate what she needs. While her screams are likely persistent, she's not trying to manipulate you. In most cases, if you tend to her needs, the crying will decrease.
A baby's needs are pretty basic. He needs a full belly, lots of sleep and to feel comfortable. Once he's home for two weeks, he should settle into a bit of a routine, which can help you determine why he's crying. If he's been awake for a few hours and starts crying, he's probably sleepy. If he typically wakes up crying, he's probably hungry. He might also cry because he has a dirty diaper, is too hot or too cold, has something like a clothing tag poking him, or perhaps, he's just overstimulated and needs to shut out the noises around him by making his own noise. Go through a mental checklist of possibilities and if that fails, just hold him and try to comfort him as best as you can.
A Growth Spurt
According to the popular breastfeeding resource KellyMom, babies often go through a growth spurt around the 2 to 3 week mark. During this time, your baby might need to eat more frequently -- and as such will cry because she's hungry more frequently.
Fussiness on Schedule
In their second week, almost all babies develop a "fussy time" when they cry more than other times, and it's more difficult to console them, according to Senders Pediatrics. Typically, this fussy period occurs in the late afternoon or evening. In most cases, it goes away at around 10 weeks of age.
To qualify as colic, a baby must cry at least 3 hours a day, for several days. In severe cases, the baby will cry much more than this. Colic typically peaks between 4 to 6 weeks of age, according to MedlinePlus, but it's possible for you to start seeing the signs at 2 weeks. If you're concerned, you can talk to your doctor, but in most cases, there is little you can do except wait and comfort your child as best as you can.