ttc is just that, trying. A baby will come when the time is right. Sometimes a baby can be the push in the right direction you need. It forces you to make decisions that you may have been unable to make for a variety of reasons.
A baby changes everything. Im sure you already know that. But how it changes everything is up to you.

For every single one of our children, dh has changed jobs, we've moved house every time Ive being pregnant. We adjust and find a new groove. You work through these problems and find solutions with or without a baby on the way, but having a baby on the way can make you bite the bullet and make more serious decisions that better your entire family.