Cam Douglas' GF Busted for Being Drug Mule

Cameron Douglas' girlfriend is now in a drug pickle of her own -- she was busted on Monday for allegedly trying to smuggle Cam heroin while he was in a courtroom facing mega-drug charges.

Cops say Kelly Sott was arrested yesterday after she was caught trying to pass Cameron an electric toothbrush -- which happened to be stuffed with dime bags of heroin -- in a conference room inside a federal courthouse in New York City, according to NBC New York.

Cameron -- son of Michael Douglas -- was in court facing drug charges from his recent crystal meth bust ... the one in which the DEA believes he's been slangin' pounds of meth over the last few years.