First time mom failure

I’m a first time mom of a 3wk 2day old baby boy. I make sure he’s clean, feed him as I should/whenever he’s hungry, snuggle with him, make sure he has a clean diaper, etc. and he’s always content (unless he’s a little gassy). Basically as good of a mom that you can be to a newborn, right? Then why do I steadily feel as though I’m not doing enough? That I’m not doing good enough? When I look at him, aside from feeling love, I just feel guilt. When will it end? Or will I always feel this way?