Trigger shot question

emily • TTC #1 for 2 years. Ivf mmc in May : (. FET bfp in nov : ). Married to my wonderful husband 4 years : )
I had my trigger shot 15 days ago and 12 dpo bloodwork hcg was 2.5 so negative.  AF was due yesterday and is no where in sight...  My question is, can the trigger actually lengthen your cycle/luteal period?  I just want my period to come so I can get started with my next cycle!!!