advice?

My little guy is almost 8 weeks he seems to not be sleeping as much anymore we used to have some what of a schedule and he used to sleep 5-6 hours at night now he will only sleep 2-3 then he's up and won't sleep that much just short 20 min naps and he's eating every 2-3 hours like clock work could it be a growth suprt? I don't know what to do I'm literally up all night. He sleeps a lot during the day though so that's when I sleep but it's driving me crazy what do i do?