No AF in August..help

Nicole
No AF in August and still nothing. I took a pregnancy test 3 days ago and it said negative. I hadn't felt different or had any symptoms till today when I was at work i all of a sudden felt extremely nauseous and felt like I was going to throw up. Only lasted maybe 2 mins then it was gone.....would it be too soon to get a bfp? I've also been feeling extremely bloated the last couple weeks.