Those who have had IUI and/or trigger

Bri • 2 years TTC- 2 failed IVF, 2 miscarriages. MTHFR, Factor V, High FSH..starting another IVF in November
I had my first IUI 15 days ago, trigger shot 16 days ago. Have been testing since 13dpiui and nothing but negatives. I normally have a 12 day luteal phase so I was expecting to start AF on weds. Anyone know if trigger shot delays AF or has anyone experienced this? I'm getting pretty frustrated.