My diagnosis is severe major depression with psychotic features. I had a bad breakdown around 10 years ago. I think my mental health is cyclical in spite of the meds which keep it at bay... it seems to be under the surface all the same. It ebbs and flows...

In my case, I am developing a list of markers to help track my mental health. I think there are apps for this.

As well as coming up with a crisis plan.

It mightn't be a bad idea to have your own crisis plan that you draw up with your psychologist, so that it's in place. You can discuss it with your family so they know what is involved, but you can also identify other "safe" people to whom you can open up about SI, instead of your daughter. No need to overprotect her, as part of becoming an adult is learning that our parents are human beings, but at the same time not overburdening her.

Anyhow, perhaps someone else who has bipolar will respond better than what I can.

Btw, have you heard of the book "Touched with Fire" by Kay Redfield Jamison? She is a psychologist who has bipolar herself. It might be worth checking out her book.