It may not be what you want to hear, but reading this I also wondered where the Munchhausen Syndrome diagnosis came from. People with that dx actually create symptoms in themselves and go to doctors and receive treatment for diseases that they don't actually have.

http://www.emedicinehealth.com/munch...article_em.htm

Does this sound like her? If not, she may just have made up a story for what ever reason. It was not a nice thing she did to you. I'm sorry that it happened, and I wish you well. You are a good person for being concerned about her.