Getting my hopes up!

I performed a check and my uterus is high (I almost couldn't reach it!!), medium (I have 2 children), medium. This is the first time since I've started monitoring almost a year ago that it's been this way. I had some super mild cramping yesterday and a little tightness right now. I'm supposed to be 3 days from af, but for the last two months glow has been early and I started two days later. If I indeed did implant yesterday, when would I have a bfp? Or even a vfl? I'm not picky lol!