Newborn awake at night and sleeps during the day.

Meredith • baby #2 on the way!
Have any parents experienced this? My son is 5 days old and currently is active at night and sleepy during the day. So I am up and feeding every 45 min to 1.5 hours at night (I am breastfeeding on demand) and have to struggle to wake him every 2.5-3 hours during the day. 
Have any other parents had this? Did your child grow out of it or did you actively try to switch their patterns?