Sounds to me like she is having an issue with postpartum(sp) depression. Very touchy issue. How close are you with some of her friends or her (gulp) mother? They may be able to suggest her discussing this with her Doctor. just my opinion.
I was thinking the same thing. I have no human children, mine are all 4 legged furry kids, for such a special event in life (having a baby together) it sucks that these things happen. I don't know if anyone gets Readers Digest, but this month there was an article that hit home and I think it may be appropriate here. I am not going to paraphrase but give you a take on it.
This guy had his own law firm, he was generous in his fees, meaning he didn't want to burden someone with high fees when they were already going thru a bad experience. Anyway, people took advantage of this, didn't pay there bills, he was breaking up with his wife, she stayed in the house he took an apartment. His oldest son was a mooch and always sponging money off dad, so with these problems already, he couldn't afford a decent place to live, his heating bills in winter were outrageous because of poor insulation and leaks everywhere (I can relate to this big time) to the tune of a couple hundred bucks just for heating each month. To him life couldn't get any worse, he was in danger of losing his law firm, too.
An old friend called upon him, they met up and his friend said he had never seen this man in just turmoil, downward spiralling and just overall negative about life.
The friend told him to do one thing. Find one thing good each day and say thank you. Well this guy wasn't good on keeping to doing this type of thing but he stuck to this. Each day he found one positive thing done by someone and thanked them by note, card or letter. He did so to his son, when he paid back some of the money mooched, to his daughter that would brighten his day when he had a bad day, his landlord who came and tried to fix his toilet.
I am going to try doing this myself. Might I suggest this to you?
At night, when having your scotch, review the day, was there something that happened you were appreciative of, thankful for, an incident that made your day, no matter how inconsequential? No I am not saying you have to write a note to them, but just for your sake, write it down, dwell on this, the good, the positive and relax.
And get her to a Dr. for a checkup.
Things are bound to change... it just takes time. In this fast food society we want everything instantly... time takes time.
Have a blessed Holiday, my friend.