I have a 7 week old son who about 3 weeks ago starting going down after the last feed at 10 - 11pm then waking between 5am and 6am which was great. The last 3 nights he has been waking at 3-4am and last night he did not sleep again after this feed. I don't think he is getting hungry as he is taking more food than before throughout the day time. Is this normal? We are moving him from a crib to a cot tonight to see if that makes a difference. Any other advice, tips?????