You should be glad that you didn't do anything about it and you didn't listen to your friend because she was just trying to stress you and make you work harder.  This was a really tough competition. Still it was not trustworthy for her to lie to you. All of the sudden your friend tries to convince you that there is another rumor!

Think that your friend is lying to you again and ignore her.

or

Put aside what she said earlier and ask what the rumor is.