Whoopi Goldberg says she was addicted to cocaine early on in her career — and it got so bad, apparently, that she started to hallucinate … eventually forcing an a-ha moment.

The actress/TV host gets very candid in her new memoir, ‘Bits and Pieces,’ about how she was doing drugs from an early age — only to get clean in the ’70s … and then dive back into it again in the ’80s as she was starting to hit the Hollywood scene.