Hmmm. (spoilers)
Your pregnant wife has mystery scratches all over herself, is exhibiting paranoia, and STABS YOUR DOG? Yeah, let's NOT call the paramedics and have her evaluated for psychosis at a psychiatric hospital. She was obviously either mentally ill or possessed (I mean, not in real life, but in the movie) - and you aren't going to get her professional help?? You're going to allow her to give birth at home? Come on, dude.
Pet peeve, but going off of anti-depressants usually does have physical symptoms, but they are flu-like, headaches, "brain zaps," etc, not hallucinations, delusions, and extreme impulse control. I hate it when movie "doctors" or "therapists" give easily google-able false information.
They're coming to get you, Barbara!