A millennial who quit her 6-figure job says the temporary financial strain was worth it after she was able to start her dream business

• Siobhan Llewellyn, 30, quit her $100,000 job last year after she became "extremely burnt out."
• She began working part time as a professor, which helped her to set up her "dream" business.
• While there have been financial challenges, she says that she's "never been happier."

A year ago, Siobhan Llewellyn was making $100,000 per year — but she knew that her situation wasn't sustainable.

Her job, an ecommerce marketing manager position in Toronto, had left her "extremely burnt out," the 30-year-old told Insider. She couldn't even read an email or attend a meeting without feeling "severe anxiety and panic."