what symptom is this?

maxene • h a p p y
i'm suppose to start my period on the first of feburary, and i haven't started my period yet. my last period was on january 4th. 
yesterday my tummy felt bloaty & i almost had to throw up multilple times. 
today, i still feel nauses on & off. i feel like i'm on a heavy period, but i'm not on my period...
i don't know what's going on?