Sounds to me like a classic case of postpartum psychosis.
在我听来像是产后抑郁症的经典案例啊。
简单心理学
In fact, evidence suggests that postpartum psychosis is actually just an extreme version of these conditions, and that it happens when hormone changes after birth crank existing symptoms way up.
The case isn't totally closed on this, though, since some research has found that at least half of those who ended up with postpartum psychosis hadn't been diagnosed with bipolar disorders.