9 months is hard. Oh so very hard.
It gets easier. Much much easier.
Then you can start living each other again. Or not if the rot is too deep.
I'd suggest if there is nothing in particular, just a sense of unhappiness of rubbing each other up the wrong way you wait it out. If you can talk it through with your oh sensibly without sniping (bearing in mind you will both feel awful right now so may not respond elegantly about the problems you are both causing each other) that is better than just being it.
But this stage is the pits