AMANDA BYNES has been dropped by her agent, her publicist and her lawyer within the last few weeks. According to TMZ, Amanda has worked with all three of them for years, but in the last several months she's become, quote, "extremely difficult." But sources say Amanda isn't worried about it . . . because as she said last week, she's leaving showbiz for a career in fashion anyway. Meanwhile . . . Amanda was officially charged Friday with two counts of driving with a suspended license. Amanda's car was impounded last weekend after cops caught her behind the wheel. Meanwhile, E! Online says Amanda's license was NOT suspended because of her two hit-and-run charges . . . but because of unpaid tickets and multiple failures to appear in court to deal with them.