My mum just tried to stab me

[Darius]

The main reason for filing is a police report is it may be the only way she can be forced to seek medical help. On her own, she never will. The courts might not even help, but at least there is a chance.
Also, before she sees a mental health care professional, she should have a complete physical workup.
Something could out whack in her labs or organically.
Has she ever manifested this behavior with anyone other than you or outside the family?

[Bookworm]

Yikes!

What a nightmare situation! I can only reiterate what the others have said; she needs Professional help, sooner rather than later before she does follow through on these threats and harms herself or someone else, especially if she has a history of these violent episodes, however sporadic! You can't go around threatening to stab people!

I'm glad you were able to get away and had somewhere to stay. Talk things over with your dad and get this reported. She needs help.