Vaginal Dilator Therapy After Pelvic Radiation

This study is testing a new program to help women who have had pelvic radiation therapy to use vaginal dilators more regularly. Vaginal dilators are important tools that can help prevent or treat vaginal narrowing (called vaginal stenosis), which can happen after radiation and make medical exams or sexual activity painful or difficult. Even though dilators are recommended, many women don't use them as often as needed. In Phase I of the study, individual qualitative interviews with patients in the target sample (N=20) and medical providers (N=10) will be used to inform the behavioral program development. In Phase II, the program will be refined through user testing interviews (N=12). In Phase III, 88 participants will be randomly assigned to one of two groups: * One group will receive the new behavioral program, which includes support and strategies to help with regular dilator use. * The other group will receive written educational materials (enhanced usual care). The study will look at how often and how long participants use their dilators, and whether the program helps reduce symptoms like pain or emotional distress. Participants will complete surveys at the beginning of the study and again at 3, 6, and 9 months, plus short monthly check-ins. The goal is to see if the program is helpful and easy to use, and to prepare for a larger study in the future.