I have put my wife through the same kind of thing when my mood is bad (depression or mixed state). If you live in the US and aren't a vet, Native American, or senior, there isn't likely to be any government-run mental health care.

But there may be some private, non-profit centers that can help your partner find a psychiatrist to help at a reduced or no fee. And a lot of private ones may offer services at a reduced fee. But don't put it off, if you can convince her to go.

For me, getting on the right meds made all the difference. My wife would tell you that for sure. There are good books to help you, like "Loving Someone with Bipolar Disorder."