I think most of us just wing it for the first few weeks. Some are just reluctant to admit it wink
In my opinion, if he needs to be fed, feed him. Once his sleeps lengthen a bit, the time between feeds will increase too. Are you feeding until he refuses the breast? Maybe try offering the first side again (or offer it twice straight up) to make sure he gets the hind milk. And 3 weeks is a classic time for a growth spurt smile
DD clicks while she feeds, always has. She had a tongue-tie, and while I had that fixed, she still clicks. It doesn't hurt me and it doesn't affect her. She isn't windy and she gets enough milk.
If he's wide awake after his feed, have you tried wrapping him and then rocking for a while? Either in a rocking chair, or just hold him and sway from side to side. Does he have a preferred 'cuddle position'? DS1 loved to be held in a cradle hold, but DS2 and DD both liked to be held uproght on my chest (DD still does wub )
As pp's have said, he's only 3 weeks. It will take a while for him to figure out his routine, and then you need to incorporate that into your routine smile Between you, you'll figure it out. You've been in a bad place before, but that doesn't mean it will happen again.
I wish I was a glow worm. A glow worm's never glum ... coz how can you be grumpy when the sun shines out your bum?!