Growth spurts?

My boy had one at 3 weeks, but we were EPing then. Exclusively BFing now, and at 5 weeks I think we're hitting another growth spurt. I'm working again (from home) and exhausted! He's always hungry or just wants to suckle for comfort, but he gets pissed off really easily with the boob if it keeps spraying milk when he just wants to suckle, and every time he falls asleep and I go to put him down, he cried until he's in my arms again. And we thought growing a baby in our tummies was hard work!