Help me

Brittany • Mother of a 6 year old, bride to be! Trying for a little bundle of joy!
So I'm 6 days DPO. These past two days I've been extremely nauseous! Like I have a strong urge to throw up but it won't come up. It's very uncomfortable. Food turns me off. My AF is due 6/9. What should I do ? This never happens before period.