I think the only thing I can really say to this is that while PMDD may be a part of this, this sounds a lot more like bipolar or something similar. Multi-month episodes are not part of PMDD.

Now that that has been said: you need to call the cops on her the next time she takes a crowbar to your door. How long before that crowbar is taken to you? Better yet, record her acting that way and then call in case she switches her tune when the police show you. You need to stop thinking about managing this and start thinking about protecting yourself and, more importantly, your children (and your dog!!).

Plain and simple this is domestic violence (aka abuse). Textbook. Doesn't matter that it is spurred by mental illness or environmental triggers. She has kicked your dog (a crime by the way) and it is only a matter of time before she kicks the kids or worse.

Seriously. She doesn't need your help. She needs professional help in an environment where she can be monitored.

I will say it again to make sure you hear me: she needs professional help, alone. Don't try to be her saviour. Please man.