Sleeping schedule

cassi

So my son is almost 11 months old now (so crazy!) But his sleep schedule has just... Never been haha he's always been a terrible sleeper. Since my fiance, his dad, started working he won't sleep until after he gets home (which he doesn't get home until 12:30am). He sleeps until usually around 12pm but he's always been like that. He's never ever slept through the night. He technically does now but that's because he doesn't sleep for bed until 2am. Nothing we have tried has worked. We have an appt scheduled for a sleep doctor in April. Anyone elses babies do this? This is me and my son.