5 week old not sleeping

Tegan

My 5 week old over the last two days has been staying awake nearly the entire day. He’ll feed (breastfeeding) fall asleep for about 20 minutes or less. He’s on and off the boob so much it’s overwhelming me because I can’t put him down because he’ll start crying. I’ve tried a pacifier but he won’t take it. Should I be concerned? He’s having plenty of wet nappies