Morning sickness...?

Lauren • 34 expecting baby #4! 💙👶🏻💙👶🏻💙👶🏻💗👶🏻
Strange question here...I've been feeling like I'm going to throw up. I havnt yet but I get that hacking feeling just before. But I don't feel "sick". Is that morning sickness? Feeling fine, but about to throw up? 
I've never been preggo before and I'm 2 days late (BFN yesterday). So I just don't know if this is morning sickness or not...