3 days till AF

I made a post earlier about how I wanted to test with an 88 cent test from Walmart and accidentally put 3 dpo because I am exhausted (and stressed) ... So would it be too early to test in the am? AF is due Saturday and by now I am usually cramping so bad and I cramped a bit the last 2 days but not much since. I know I'll know for sure if AF doesn't show up and I have a Dr apt Monday but I just want to know what you ladies think. :)