The 'Nothing Compares 2 U' singer has recently reached out for psychiatric help on Twitter after trying to end her life last Thursday (January 5) and on Tuesday (January 10).
"I took an overdose," The Sun quotes her as saying. "God obviously wants me around - though I can't think why."
O'Connor assured fans on Twitter last night (January 11) that she had a selection of "numbers, contacts, etc now and appointments" after appealing for treatment.
The 45-year-old also spoke of the effect that her depression was having on new husband Barry Herridge, writing: "so me start meds for few weeks just they say to lift out of apres marital abuse of innocent hubby by nasty ppl depression. (sic)
"hard if u see someone u love bein hurt cus of u is all.. f*x self esteem.. which aint always massive for any of us... he gentle soft heart.. not bitch like me.. he a flower.. me nuh like see him hurt.. he me angel."
When a follower asked her what medication she had been put on, O'Connor said that she would be on "low doses... nothing dumbing" for six weeks.
She also told her Twitter followers that they should not feel "ashamed to reach out" for help with mental health issues.
O'Connor has been forced back into the public eye recently following her surprise marriage to Herridge, the announcement of their divorce 16 days later and a subsequent reunion.
The star has admitted to having suicidal thoughts before and worried fans last September by saying that she wanted "to go to heaven so bad".
O'Connor later clarified that she believed suicide to be a sin, reasoning in a website post: "u may as well have murdered every one who loves u even remotely. And we all have people who adore us. Even if we think we don't."