3:00 PM PT -- Toni is now in an L.A. area hospital. She was initially checked out by a doctor in Atlanta, but we're told she flew to L.A. late last week and was admitted for treatment.
A rep confirms Toni was getting treated for lupus, but says she's doing better now, and she's hoping to start rehearsals soon for an upcoming tour.
Toni Braxton was laid up in a hospital and in serious condition stemming from her battle with lupus ... TMZ has learned.
We're told Toni's been hospitalized for 4 days. It's unclear if she checked herself in or if she was transported by ambulance. When Birdman got the news, we're told he hopped on a jet from New York -- where he was on the road with Jacquees -- to be with her.
Toni and Birdman started dating seriously earlier this year.