I had unprotected sex with my Gf on sept 14th. I didn't insert inside just rubbed outside of vagina but I don't whether precum touched or not on outer part of vagina on the safe side I gave her ipill with 32 hrs and she got her period on time on 27th of sept. She has 28 days cycle. And next month she got her periods again 27th of oct but this time 1st day heavy and second and third day normal and next month she got her period on 23rd of nov and in dec on 21st but this time 1st day normal and 2nd and 3rd day light now yesterday was her date but her is not coming. Is there anything to worry?