Am I exaggerating in my reaction or am I right?

Someone had written in her biography about the mental illnesses she had. I'm pretty sure she doesn't even have one of those diseases though, because if she was really sick she wouldn't show it. I told her that she was an attention freak, that I was sure she didn't even have one of those diseases. I said, "I bet you're posting a photo of the hospitalization on your Instagram story, which is definitely fake."

After that, she said that her diseases were diagnosed and she used medicine for them. She said, "I've never got so much prejudice in my life," and put a crying emoji.

Am I exaggerating in my reaction or am I right?
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