Cardi B Reveals 'Freak Accident' Almost Made Me Lose the Baby

2:49 PM PT -- Cardi B has shared more details on the terrifying accident that left her concerned for her unborn child's safety. The rapper took to X Spaces on Thursday, where she confirmed she slipped while going down the stairs ... telling her fans she "kind of busted [her] ass."

As Cardi put it ... she heard a "pop" after the incident, which left her unable to move and screaming out for help. Cardi tried to sleep off her pain, but as the situation became worse she went to the hospital ... where she learned she tore a ligament in her pelvis and was dilated.

Per Cardi, she began having contractions "every two minutes for a whole 24 hours" ... before she was finally released and sent home on bed rest. She also has to do physical therapy.

Cardi B is speaking out after recently suffering a "freak accident" ... sharing with her fans all the terrifying details, including how it nearly cost her baby No. 3.

In a recent X Spaces convo, the rapper said she was recovering from a scary ordeal ... which left her briefly "paralyzed" ... and on the verge of losing her unborn child.

While Cardi didn't share what sparked the health scare, she did note the incident became so bad it "almost cost me my little one," indicating she almost went into early labor.

Cardi announced her pregnancy last week ... one day after filing for divorce from Offset, who she married in 2017.

As TMZ previously reported ... Cardi's divorce filing confirmed Offset is the father of her unborn baby, as she requested child support for all 3 of their kids. Cardi and Offset also share a son, Wave, and daughter, Kulture.

She has yet to reveal the gender of her new little one, who's expected to arrive later this year.

Thankfully, Cardi assured her followers that her baby was fine in the aftermath of the medical episode, but noted she's still struggling with pain.

As she put it, "If I don’t feel good in four hours, I’m going to the hospital and I don’t give a f***."

We've reached out to Cardi's reps for comment ... so far, no word back.