pregnant or no?

Mary
Hey! First time posting! 
I'm 6 days away from getting my period. But my question it could I possibly be pregnant? My nipples are extremely sore (just my nipples) they are a little dark and I have white bumps on them. I'm nauseous some days but not all, I'm also a smoker and lately the taste of cigarettes make me gag (smell not so much). I've been cramping but nothing too painful, and I do get a little nauseous when I cramp but not every time.  My 2 1/2 year old is attached to me as well when usually he could care less where and what I'm doing. I have taken pregnancy test all came out negative, I know it's early to take a test. Sorry for rambling. 😅