I'm sorry it's so tough during the day, but good going on the night sleeps little man! I tend to agree with Marcellus, going by my DD, from week 16 to 20 was just crazy for us, nothing I did really helped, sleeps were hit and miss, moods were up and down, it was really quite stressful for me! Just when I gave in and gave up with worrying about sleeps, everything calmed down and she's back to sleeping during the day. She has had a huge developmental leap too and is processing so much more and doing so much more, I can only put it down to the progress? Have you tried going for a walk in the pram? That would give us up to half an hour sleep to get through and helped clear my head too. Wish I could help more sorry