Having a reputation for being difficult in Hollywood sent Katherine Heigl to the therapist’s couch.

“I had never done therapy . . . until a couple of years ago, and I started going because of the scrutiny, and I was not handling it well. I was feeling completely like the biggest piece of [bleep] on the bottom of your shoe,” the “Knocked Up” star told Howard Stern on SiriusXM Wednesday. “I was really struggling with it, and how not to take it all really personally, and not to feel there’s something really deeply wrong with me.”

Heigl told the shock jock that she was so upset by people’s perception of her that she stopped speaking up on sets.

“I remember doing this little independent movie and [I was] just afraid to say anything about anything. And I remember wearing shoes a size too small, because I was afraid to tell wardrobe that they weren’t big enough, because I didn’t want to be difficult. And after that I was like, ‘This is nonsense, stop it. Get some help and own your voice and relax.’”