Trust me, in a years time you will look back and think "why didn't I just do what felt right rather than worry about whether it was the 'right' thing"
This will all seem like such a small drop in the ocean soon, so co-sleep if you can, let them nod off on your chest, nap in the day and don't get out of your pjs. Just do what you need to do. Before you know it, there will be another phase that consumes your thoughts.