Feeling weird

So I got faint postives about 3 days ago now and i was feeling pretty okay . According to the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> app my period is due today and there is no sign of it . Today i have been feeling horrible . am i getting emotional because of the pregnancy ? Also im extremely uncomfortable and i cried 3 times about how im feeling i feel weird i dont feel like myself stomach is hard and a little bloated . does anybody else feel like this ? any nice advice is welcome if you're gonna be rude just please dont.