TTC for the first time questions

Ly
So this is my first time ttc, we've just started trying on the 22nd of this month. But we started trying on the last day of my fertile window we've been fairly active since but I was wondering how many of you lady's have gotten pregnant on your last day of your fertile window? I'm a week out from when my next Aunt Flow and am having some possible symptoms but nothing definitive, like I've been abnormally crampy, my uterus feels fuller than normal, I've had a horrible back ache for the last 2 days, and I've had some indigestion (which is really abnormal for me since I never get indigestion) in really trying not to get my hopes up but I can't help but to wonder.