OK so I just consulted my trusty Wonder Weeks book and there is a fussy perios from 15-19 weeks with a "stormy period" around week 17 .... remembering that some kids fo earlier and others later it sounds to me like he is smack bang in the middle of a development leap.

No offense to anyone who found the "No cry sleep solution" book a miracle worker but personally I found the documenting sleep made the problem worse for me to deal with ... I threw mine into the fire place (along with a couple of other books along the same lines) and just rode these phases out. They all pass eventually.

its a very trying and tiring time but if your finding yourself MORE frazzled "because the book says XYZ....." throw the book out because there is NOT a book in the whole wide world written about YOUR baby.

If you find it helps ....... read my information and throw it out the window

Nae x