The process of creating a vagina can take as little as 2-3 months or as long as 18 months, depending on how often you use your vaginal dilator and if you’re using it correctly.f you have a small vaginal opening, place the dilator in the opening. You can find the spot by slowly and gently sliding the tip of the dilator in the area right under your urethra. Using pressure, hold the dilator in place for about 20 minutes.