Evapppp!!!????

Nicole • Mother to two beautiful boys
So I have taken hpt the last 4 days and each day I got a bfn within the time window and then a stronger and stronger Evap..... Each day.  I know these are invalid, and shouldn't be read... A girl can dream.. I have a negative from last cycle on the same test, still as white as it was when I first got the bfn.. Has anyone had this Happen.. Or do you get what you pay for (88cent Walmart test)??