If you two want to be together at the end of this, it will happen.
You. Keeley, are dealing with the challenges of two young children, one a baby. It's stressful, and sleepless nights compound that.
I've read this and you don't blame Carl, so ask yourself this. Can you both work harder so you can be the best parents for the two children you have created?
This is not a quick fix. Living as a pair with demanding children isn't easy.
If you can salvage this and come out the other end still intact, it will be so worth it.
You're both good people.