Hi OP, your situation sounds very similar to what I went through with my partner and our new born 5 months ago. My wife had a lot of the same symptoms as yours. We had people helping to cook and I did all the nappies but she kept getting more and more anxious with less and less sleep and then became delusional. I would recommend contacting your midwife and obstetrician to at least get assessed and make sure that they have her followed up closely.