Time for a good communication session. Not at her place or your place (or home if you live together). Go somewhere and have coffee and discuss feelings and whats going on in the back of your minds. No yelling allowed and no self defense until the other person is talking. No blaming. Make rules. Of course be honest even though it hurts.

There is a root to the problem, its stemming from something. It could have started from something small and worked up to something big. Im guilty of doing this. It builds up and then "BOOM".

This needs to be cleared before lil guy comes into your life. People have babies to make their marriage better, not a good idea! It makes it worse. Babies cry and get sick...they are stressful, and thats just the tip of the ice burg. They are also expensive. But they are so worth it.

My advise is get to the root of the problem. Ever heard the song by Pink, "Reason". That is a great example.