hmm advice

the 11th said there was a 22% chance of pregnanct and yesterday I ended up throwing up in the morning my boobs have a slight different feel to them. I'm supposed to start my period on the 25th and my nipples hurt a little bit is there a possibility that I could be pregnant. I've taken pregnancy test and they come up negative. I'm wanting to wait and see if my period comes but im getting paranoid. my stomach also hurts when I have a bunch of pressure on it from holding my 1 yr old or her pushing on my stomach.. I'm just confused. update. I've been feeling sick to my stomach and just ended up throwing up.. should I take another test it'll be 6 days early