No. Sleep

This. Is My. Second child. It is a boy,  and I'm very excited! I'm 18 weeks and I have a 4 year old. I barely get any. sleep at night so I'm usually sleeping during the day. I fall. Asleep before 9. Pm every night and I. Wakeup around four. Am and never go back to. Sleep until after. Breakfast which is. Around. 11. Am then. I'm back. Up around 1 pm smh. Anyone. Else has this issue?