Day and night...

My lo is almost 10 days old. Last night neither of us slept, he just ate, cried and fussed. Figured oh well I'll nap when he does during the day....but instead he is fussing even when he's sleeping so I'm still not getting sleep. I'm so tired and have a 3 yr old as well. Single mom so just me. I've burped him, fresh diaper, warm enough, plenty to eat....I'm lost....is it just me??? Amy suggestions?? Sooooo tired