Need female advice

Hi ladies my period normally arrives the 31st or 1st i usually go 4-5 days bleeding cramping the usual this month was off no normal period i did bleed lightly for a few hours i used 2 tampons really wasn't that heavy but i didn't want to mess up my clothes because i figured aunt flo was on the way today nothing but have been having cramps in lower back if nothing chances by the 7th i will be testing just thought i would get some feedback