Still in pain over the shocking humiliation of ex-fiance Billy Bob Thornton dumping her for Angelina Jolie, Laura Dern FREAKED when she hit Vancouver to film the TV movie “Damaged Care” — and learned Billy Bob AND hubba-hubba wifey-poo had checked into her hotel! Laura phoned producers in a rage, screaming she’d go NUTS if she even glimpsed her ex OR Angelina! “Fine,” said producers. “We’ll move you right away!” But Laura got more agitated, insisting on guarantees that she’d NEVER run into the couple — even if she went out shopping or dining. Stunned producers bucked the problem to the studio, which jetted an executive troubleshooter to the set with orders to “Fix it! Give Laura whatever she wants!” Stay tuned . . .