Mentally ill wife may commit suicide.

Hello, I got married a year back and me and my wife we are living separately just after 1 week of marriage. She is living at my place alone (my parents living in another city) and i am living on rent in same city. Our marriage was court marriage and no one from her family attended. In fact no one from her family even talks to her. Wife's previous husband died of brain stroke 7 years back and she was living alone. In one week of marriage i felt like she was not mentally stable. Yelling loudly unnecessarily, banging head on walls, hitting herself, hitting me, picking up knife in kitchen and threat, threat to suicide and she also went to railway station saying she is going to commit suicide. etc. I took it lightly as a threat. One year passed and i asked for divorce and she has filed false 498a, 506 against me. Recently i came to know that she had made suicide attempt with her previous husband by consuming baygon. She was hospitalized for 3 days for the same. As she is not mentally stable, and has already attempted suicide twice, i am very sure that she may and probably WILL do it again. It's not just a threat but REAL attempts. (she may die) If she writes a suicide note with my name and actually commits suicide, i will be in big trouble. What precautions should i take in advance? 1. I don't have evidence about her past suicide attempt, but her friend can testify. (Can someone be forced to testify if she refuses?) 2. She is not ready to visit any doctor, so i don't have any medical records to prove anything. I am really scared and i keep googling day and night in this regard. Please suggest. :(