how many days late did you finally get your BFP? what we're your symptoms?!

I was supposed to get my period on the 29th, it is now the 31st and still nothing. I am usually very regular- getting my period on the exact day or 1 day before or 1 day after. 
I have been cramping on and off for the last few days, running to the bathroom thinking my period must be here any second! 
I took a FRER today and it was negative. It was not my morning pee, but would still assume if I am pregnant and 3 days late that it would still pick up something faint- It was stark white!
Has anyone experienced this before? What we're your symptoms like before your BFP and how long did you have to wait to test?