Hazy memory of sick Cos session

HEIDI THOMAS can only remember “snapshots” of Bill Cosby drugging and sexually assaulting her as he creepily referred to himself in the third person back in 1984, she testified Tuesday.

The married mother of three said whatever the comedian allegedly used to spike her drink, it caused her to black out at his Reno residence during what she thought was a coaching session for her fledgling acting career.

“I remember waking up on a bed,” she testified to a rapt courtroom in Norristown, Pa.

“He had no clothes, and I was laying down, and he was forcing himself into my mouth,” Thomas (photo), now in her late 50s, testified.

Thomas took the witness stand on the second day of the comedian’s retrial on charges he sexually assaulted former Temple University women’s basketball manager Andrea Constand in 2004.

Cosby, 80, has pleaded not guilty to drugging and sexually assaulting Constand, 44, at his suburban Philadelphia mansion.