Ezz -I have been thinking about your post and remembered a sleep table that recommends how much sleep a bub needs at what age. I used this table with Sara and it seemed to work. The sleep lady says that if your bub needs for example 14 hours of sleep in a 24hour period and bub sleeps 10hours overnight then bub should need around 4 hours during the day.
I always used to count how many hours bub slept for then I knew roughly how much sleep she would have during that day.

If you want the table pm me your email add and I'll pass it on.