A girl told a bunch of our mutual friends that I raped her, what can I do?

This should go without saying, but none of you know who I am so I will clarify: I did NOT and would never even consider having sex with a girl who even showed the slightest bit of doubt in her decision to have sex.

A friend of mine set me up with a girl she knew who my friend claimed had a long-time crush on me. On the second date, we ended up having sex. Hopefully this isn't too detailed, but I feel it is important that she took off her clothes first and got on top of me and proceeded to remove my clothes.

I went out of town to return to college the next week, and weeks later I heard from mutual friends that this girl I had had sex with was telling people that I made her feel like she was forced to have sex with me, and she even told a couple of people that I raped her.

Horrified, I confronted the girl via text message, asking her if this is true. She vehemently denied that she had said those things, and then explained that she had simply felt some regret afterwards about having sex with somebody that quickly. I told her I believe my friends over her, and I cut off communications with her. I saved pictures all of the text messages to be safe.

I've been periodically anxious about this whole situation. Should I be worried that she will do anything more than just telling her friends that I forced her to have sex with me? Or on the other hand, would it be justified for me to sue for libel? Thanks for any advice.