Hi Megan,
I keep saying this but will say it again...lol...I am no expert but sometimes there isn't enough of the pg hormone Hcg, I think it's called, in your system and IF you are pg (which I hope you are coz you want it as bad as I do I think!! lol) it might take some time to show up! I would maybe test in a week if your af doesn't show up before then!! And even though your partner had withdrawn early there is supposed to actually be more little guys in the pre then the actually stuff. Anyways, good luck to you and let me know!!
Flutter