No, you're not alone. I've had copycat/one-upping friends before. These people are twisted and usually crave the spotlight because they have low self-esteem and/or chaos in their lives.

She's being unfair to you. You've expressed your feelings about what happened to you — and you should be considered the expert on that subject! — yet she still ignores what you're saying.

Do you think there is a way to talk to her again in a way that will help her understand that a) this illness isn't a stunt, and b) she's hurting you?