Not enough awake time.
Getting a cold.
Has a cold.
Getting over a cold.
A ‘leap’ on wonder weeks based on due date.
A ‘leap’ on wonder weeks adjusted to the day he was born to try and make it give me the answer I want.
A growth spurt.
Not colic but something almost as bad.
Needs a poo.
Needs a fart.
Needs a feed.
Needs a burp.
Might need all/none of the above.
Inherited my bad sleep genes.
Injections. Even though they were 2.5 weeks ago.
That coffee/dairy/spicy food I had for lunch thats potentially polluted my milk.
Boobs run out of milk?