No period in FEB?

Last period was Jan 27-31st. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> predicted my period on March 1st and today is March 7th and still nothing. Weird thing is I feel completely normal, I have no pms symptoms that I usually get (sore breasts!!, cramps, headaches etc) it’s so weird that I don’t have ANY symptoms and yet no period... I don’t think I pregnant but what do you think?