Ds2 is 10w+3d.
For the first 7ish weeks of life he woke twice during the night (between 11pm and 7am) to be fed. This gradually got more frequent, and at 9w we tried giving him formula at bedtime. This worked well till 3 nights ago. For these 3 nights he's been waking at least every 3hrs. Last night was hellish - he woke every 2.5hrs, and was awake and grazing for at least 45mins each time, meaning I got very little sleep.
His formula feed last night was 7, yes 7, ounces, PLUS a breastfeed of 20 mins. He still woke up hungry 3hrs later.
But he has slept for AGES in the morning of these 3 days (Saturday today. Sunday slept 3hrs but already hadn't been fed for 3hrs, so there was 6hrs between feeds. Today 3hrs) - if it was a growth spurt, wouldn't he wake up hungry from the morning sleeps too...?