1. Your life has already gone for a toss before filing any suit against your wife. So, you won't have to worry any further for being tossed.
2. Audio/Video record all her such threats for a continuous period without her knowledge and while recording the same, you converse very politely and/or naturally.
3. After completion of one year of marriage, file a divorce suit on the ground of cruelty since threatening to commit suicide regularly without any reason, amounts to cruelty.
4.However, try to get her examined by a psychiatrist to identify any mental ailment she is suffering from and if that is proved/recorded, your chance of getting decree of divorce will become brighter.
5. Contested divorce suit may take 2 to 4 years to be disposed of on an average.