The 'Good Place' actress - who has previously spoken about her battle with eating disorder anorexia - feels "so lucky" to have survived and gone on to get help and urged those who have hit rock bottom to "hang on" and ask for help.
Marking World Mental Health Day on Thursday (10.10.19), she tweeted: "Today is #WorldMentalHealthDay. This month, 6 years ago, I tried to take my own life. I'm so lucky that I survived, and went on to use EMDR to treat my severe PTSD.
"I urge you to hang on just a bit longer and ask for help if you need it. Because things can turn around. I promise."
EMDR stands for Eye Movement Desensitization and Reprocessing therapy, an interactive psychotherapy technique used to relieve psychological stress.
The 33-year-old star went on to urge people to speak out in order to remove the stigma around mental health problems.
She added in a second tweet: "There is so much work to do in Improving awareness and mental health care, and we need to further de-stigmatize the conversation around asking for help. While you're gathering the strength, I recommend the work of @matthaig1 @Ayishat_Akanbi and @scarcurtis ALL my love to you.(sic)"
Jameela's admission comes a few days after she revealed she has previously battled cancer twice.
The former model - who has previously revealed she had a breast cancer scare in 2015 - hit out at the "cultural taboo around ageing" as she suffers from neurological condition Ehlers Danlos Syndrome (EDS) and has also been stricken by the deadly disease, so every moment is precious to her.
She replied to a tweet slamming her as "too old" to wear a floral dress: "That's fine. I don't care if you think I'm 78. Because I think aging is cool and I hope I'm lucky enough to be able to do that. Not everyone gets the luxury of getting older. And I think it's a sacred thing that I cherish every day. My lines are my souvenirs.
"It is a sickness of our society to look at aging as anything other than an achievement/privilege.
"I would just like to say, that as someone who has been chronically ill my whole life, and had cancer twice, I find it EXTREMELY offensive that there is a cultural taboo around aging. Those of us who fight for our lives and those who lost that fight young, deserve more respect.(sic)"