The 26-year-old actress, who shot into the limelight in 2008 when she starred as Isabella Marie 'Bella' Swan in the popular franchise, said the success was so overpowering that it gave her stomach ache, reported Femalefirst.
"I went through so much stress. I had panic attacks, I used to puke every day and very casually too. I didn't have an eating disorder; it wasn't to do with that.
"I always had a stomach ache. And I was a control freak. I couldn't anticipate what was going to happen in a given situation, so I'd be like, 'Maybe I'm going to get sick' and then I'd be sick," Stewart said.
"As I am getting older I'm going into my OCD. If things are a mess, I feel like I have lost everything. So I procrastinate by tidying, which is so stupid.
"I say to myself, 'Just do what you need to do. If you want to write something, if you need to get a thought out, if you need to call someone about something creative, do it now! You don't need to organize your desk first," she said.
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