Mom guilt

I have been struggling to sleep at night with my 2 week LO. I was EBF him. But was always worried if I was producing enough. Had enough wet and dirty nappies. But last night he fussy and it seemed wasn't getting enough out of the breasts, was agitated and we couldn't calm him, he kept putting his hands in his mouth so ... I gave in. Fed him formula and he was instantly calmer.

I feel like a failure. How do I increase my milk supply? How do I manage sleeping and night feeds?

should I start pumping? Which pump should I get?

I feel lost!