When you get a flat tire you can catastrophically repeat over and over to yourself that "I've got a flat!" and point at it and run circles around the car and wonder what you're going to do and "omg I've got a flat this is terrible", or you can start telling yourself the story of the actions you're taking to fix the flat: 1) I'm finding the jack, 2) I'm loosening the lugs 3) I've got the spare ready, 4) you get the idea...
Reclaim your power and focus on the positive actions you are taking as minute as those seem in the moment. Meditate deeply on those, maybe even journal them daily so you force your brain to stare at the evidence that while you might feel like you're in a rut you are logically taking good steps through this rut experience.
Btw, don't underestimate the impact of the stresses of coming fatherhood, you've got a lot going on unconsciously that's less a "rut" and more like your entire biology reconfiguring itself for a new daily role. You do need to make some changes, ideally make a list of what your brain is telling you to change, but you'll be OK man.