Possibly pregnant, but negative test?

Hi all. So the last couple days I've been super nauseous (no vomiting) with no other symptoms consistent with stomach flu, food poisoning, etc. I'm supposed to get my period in five days. My husband and I had sex about a week and a half ago. We use the pull out method but he never came so if anything it'd be pre-ejaculate.... I took an early prediction test yesterday and it read as negative. I have one child and when I was pregnant with her, my first trimester the moment of my missed period I was violently nauseous and vomiting.. Ideas???