Late!!!!!

Rande
According to my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a>, my period was supposed to start on the 8th or 10th of Oct, still no signs of aunt flow or the normal period symptoms. All of my symptoms are mild, nausea, constipated, sensitive nipples, dizzy, tired,gas,burping,vagina is a little purple. The tests are coming out negative.