Baby wakes up often when breastfed but sleeps for 2 to 3 hours when pumped and fed same breast milk

As the title suggests, my 5 week baby boy (I am a FTM) gets specially fussy in the night and doesn’t sleep well. Baby doesn’t sleep well during the day when breastfed. Today I pumped and fed, and baby slept for 3 hours straight, that too twice. Baby latches fine and we confirmed that he doesn’t have tongue tie. Sometimes he drinks for 30 minutes and sleeps off, and wake up in 30 minutes again. He only drains one breast and wakes up.My concern is when I pump, he may not be getting enough hind milk. How can I make sure he breastfeeds and sleeps well during the day?Thanks in advance. via /r/breastfeeding https://ift.tt/1o0CjNi