Here we go again:  Britney Spears caused a disturbance at the Chateau Marmont hotel in L.A. Wednesday night . . . and may have been injured during a fight with her on-again, off-again boyfriend.

It all started around 10:30 p.m., when someone called the cops to report a disturbance.  Apparently, someone matching Britney’s description was harassing and threatening hotel employees and guests.

When police got there, they saw no signs of trouble, so they left.  Britney and her man, Paul Richard Soliz, went back to their room at about 11, and proceeded to have a HUGE fight that allegedly turned physical.

Britney ended up out of control and screaming in the hallway, possibly having some kind of breakdown . . . and may have had an injured leg.  Paramedics were called.

When they got their sometime after midnight, Britney was leaving the hotel with a pillow and blanket, and had obviously been crying.  She didn’t get in the ambulance, she just went home . . . without Paul.

Then she posted a statement on Instagram saying, quote, “the news is fake,” and she’s “getting stronger every day.”

She added that she twisted her ankle, the paramedics showed up at her door “illegally”, and, quote, “I’m moving to Boston.”  (???)