It’s probably a growth spurt. The common ones are 3 weeks and 6 weeks. Constant feeding and fussing does not mean you’re not producing enough. Just keep nursing, every time he wants even if it’s every 30 mins. He is telling your body to make more milk. Stop the formula if you want a successful nursing relationship. Trust me you are doing more harm than good. We’ve all been thru this and yes it’s hard but don’t give up! Literally your only job right now is to nurse your baby!

Fussing while nursing is normal during al these growth spurts and mental leaps he’s going through. Cluster feeding (nursing literally 24/7) is normal too. As long as he has enough wet diapers then he is getting enough.

I can relate to this.
Don’t give him formula until your doctor says so.
You ARE producing just enough for him. Keep up with your water and fiber intake.
I can almost guarantee he is fussing for some other reason like gas or constipation or reacting to what you’ve eaten.

Don’t over think it. Talk to your pediatrician and formula is the last resort. He’s too young and this is prime for producing milk.
Pump or feed more often and you’ll produce more.