You need to relax.

Think about it this way -- you are very tired of working daytime, taking care of baby at night, do you/will you have any energy to get involved in a divorce process? If you divorced and got child custody, where are you going to put your child while you are at work? If I am a judge, I probably will assign custody to your wife just for the fact that she can take care of the baby 24/7, at least, in theory.

You need to learn to relax, maybe even talk to a specialist. The quick ways to make your life easier: spending money! Hire people to cut the lawn, take care of flowers; hire people to clean your house; get take out 2 or 3 times per week. (There are tons of meal preparation places too.)

It is really difficult when baby is small. Do trust me, though, things will get better. Don't worry about "saving" money right now. It is more important for your child to have an energized daddy to play with NOW than being left $1million when he is 40.