Pregnant??

So my boyfriend and I have been having unprotected sex the past month on and off and glow says I should have gotten my period on the 24th of July. I still haven't gotten my period, I'm 4days late now.. I've taken 2 pregnancy tests and they both came out negative. but my boyfriend and I have a strong feeling I'm pregnant I've been extremely noshes and cannot hold down food the last 2days either.. what's your thoughts ladies??!!