From your story, you said you included prove of airline ticket, passport stamps and photos of your trip when you visited your fiancé on October 20. Is that this year or 2020 ? Coz you only need to meet atleast one time in the last two years, the requirement doesn’t say you should file I-129f two years after you meet. You need to clarify this.
If you meet her in person this October and you file after that then you’re good to go you did well and you don’t need any waiver.