False rape allegations

Hello, I am a young man recently selected for a government job. Around 4.5 years ago, I had a brief physical relationship with a woman in my village. It was mutual and consensual. Since then, I have had no contact with her at all — no calls, no texts, no meetings. For the past 2.5 years, I have mostly stayed outside my village, preparing for competitive exams, and only visited home occasionally. Recently, I noticed behavior from her that seems like an indirect attempt to provoke or trap me — such as deliberately singing s*xual or vulgar songs near me without directly speaking. I have never responded, never spoken to her, and I’ve tried to stay away completely. Now, I’m very afraid that she might try to file a false police case (like harassment or assault) out of personal revenge or to damage my reputation and job career. I have no idea why she might do this, but I’m under constant mental stress and fear. I want to ask: What should I do legally in advance to protect myself? How can I safeguard my job and my family’s name if she files something false? What legal options exist in such cases when a person fears being falsely implicated? Please guide me. I have never committed any wrongdoing, but I am very worried for my future.