I'm six days late on my period I took a pregnancy test at 4 days late came negative an it wasn't digital an I read that their only 35-40% accurate an it was negative an my symptoms are nausea ,head ache ,cravings nothing crazy ,peeing more, got lightheaded twice ,really tired an sleepy some diareah an sum constipation cramps for only 5 days ,sum discharge ,sensitive to smells ,strange pullings on my tummy ,shortness of breath,sore breast,bloated do u think I could be pregnant and if so when should I test again?