Am I pregnant or too early?

I’ve been testing every day since 6 DPO (I know, very early) I wasn’t having any symptoms & everything was negative. Last night I took one and I thought I saw an EXTREMELY light line but my husband said he didn’t see anything. I took one this morning and it was negative. I was supposed to get AF today but nothing... I felt fine all day but when I got home I just felt so so so nauseous and I still do. I’ve been fighting throwing up for 2 hours. Has anyone experienced this or something similar??