Baby waking every hour

Kass • I have a daughter who is 7 & a son who just turned 18 months.My heart is so full☺️
My baby boy is 5 weeks and doin great at breastfeeding. The last few nights tho he's been waking almost every hour. I'll nurse him and then he falls asleep eating. Some of the times he's awake for an hour at a time. Do you think he's not eating enough in one setting and that's why he keeps waking up every hour? During the day he kinda does the same.