It is important to follow up with HPV negative ASCUS at least every six months for two years. After two years, you should return to your doctor for a Pap test every three years. During these follow-up visits, your doctor may perform additional tests, such as a colposcopy or biopsy, to check for signs of cervical cancer. It is also important to practice safe sex, get regular Pap tests, and make sure that you are up to date on all your HPV vaccines. By doing these things, you can help protect yourself against cervical cancer and other HPV-related illnesses.