You are not alone. I have 3 little ones. My 4 yo doesn't nap. My 23 month old does but my 6 month old doesn't really sleep at all during the day, 20 mins here and there on me. Both the 2 year old and 6 month old sleep crappy at night, on average getting up about 3 times each, of course at different times. My husband doesn't help with night shift at all. Needless to say I walk around like a zombie most of the time. I've learnt how to manage on about 4 hrs of broken sleep in 24 hrs. I do quiet time here though. When the middle child is napping my 4 yo gets to watch a movie and I generally sit down with my 6 month old for some quiet time.