Fussy 6 week old need advice

Saza

So I need some advice, please. I'm a ftm and I've been having a bit of a hard time with my 6 week old for a few days, he's been acting fussier than usual. He wants to feed constantly, and he would cry at the breast sometimes, shaking his head and pulling my nipples. Is making me a bit anxious, is something happening? Is my supply decreasing? Could it be a growth spur?