Hmmmm

My period was due yesterday but its still a no show today at 10:14 am...I took 4 pregnancy tests last week and they were all negative so I dont know if my body's just being sneaky or what...usually before my period I have intense stomach cramps and extremely tender breasts but right now both my cramping and breast tenderness are really mild plus I got a dull headache slight bouts of nausea a little backache a scratchy/sore throat and I do get heartburns also...im trying to convince myself that taking another hpt would be a waste of time because I took 4 last week that were negative...should I wait a few more days or do you think I should test again?