Both my littlies have slept 12-15 hours through the night, then naps through the day aswell from newborn (DD was 3 days old & DS was about 3 weeks old)

I was a bit worried about DD at first as I was a first time mum & when I told the ECHN at our first mothers group meeting how many hours through the night DD was sleeping she told me I needed to wake DD! I was worried I was doing something wrong until my mum said "never wake a sleeping baby, she'll wake if she's hungry." So I didn't & they have both slept through like that since.

DD is perfectly healthy after sleeping that much since day one & DS is healthy so I wouldn't be worried if I were you

I say enjoy it!!!!