Help! I'm confused/worried

So this is my chart from another app. Just easier to read...A little confused/worried. We've been TTC for a year now but this is the first month I've used OPKs. I'm using clear blue digital. For the past 7 days I've gotten the flashing smiley face saying high and we've been trying to BD as much as we can. Well now for the past two days I've had some mild cramping that I would normally have right before I getAF but AF isn't due for another two weeks. Has anyone else expierence this?