I have spoken to several medical professions and now completed comfused. However I really value and have always found our advice very helpful. I have heard this is quite normal at 3 weeks. My son is almost 3 weeks adjusted age(was 6 weeks premmie born on 28/02) lately he has been awake for several hours at a time sometimes up to 5. Not crying just unsettled and not wanting to sleep, this is happening during the day. Sometimes he just likes happily in his cot awake... apparently this can be normal behavior at 3 weeks and last for several weeks. One profession said they just want to be near you so suggests rocking, carrying in baby carrier, putting in pram etc. He seems to be ok at night. i have taken him out a bit more the last few days not sure if that has disrupted him and also recently had a cold. he is averaging 2-3 hours at night, the other night he randomly slept 6 hours and that was a one off. He is formula fed 120mls 6-7 times a day and poo is normal.