Should I re test?

Ok ladies. Today makes me 5 Days late for AF. I’m never ever late. I’ve been having unusual symptoms like bad acid reflux and bad lower back pain. Then my usual symptoms sore breasts, nausea, headache, light cramps that just last no more than 5 minutes and go away. I decided to take a Walmart brand blue dye test and got a negative. Should I re test using a different brand? Or is there just no chance I’m pregnant. Any comments would be appreciated thanks! :)