Im 6 days late on my period. Im always very hungry and if i dont eat i get light headed and nauses. Also before my period i had period like cramping but no period. On sunday i was throwing up yellowish and green vomit. Alittle of the food i had that night too. I also get hot flashes alot and i loose breath faster. I get nauses to certian foods which is wierd for me. So far ive tooken 6 pregnancy test all negitive .