Wiped blood & it disappeared.my period is late was due on the 26th people say implantation bleeding. pregnancy test was negative what could it be ?

Happens sometimes: Many women have occasional variation of their mucus discharge, some spotting between periods, a heavier period, a lighter period, a longer or shorter period, or even a missed period. Having one or two of these symptoms doesn’t necessarily mean there is a medical problem. One can repeat a home pregnancy test next week, if still worried about pregnancy, or if the first test was done too early.