Feel pregnant - negative test

ok today i plucked up the corage to take a test, as really i'm not feeling, right, my nipples are really hurting, never happens with me, gone of my fav food, curry, can't drink tea wi milk in, beeen feeling sick for 2 weeks on and off, been so tired, dizy, had some extreamly light brown spotting which lasted a day and bit, abotu 2 wks ago, i'm due my prediod tomorrow, i'm always dead accurt with them, like clock work, so i wanted to take the test early , said i'm not preg. but i'm telling you my nipples are really bad, could the test be wrong? thought they would be right by this time, all i know is i know my bady and i'm not feeling right, had lower back pain too, guess i will have to wait and see if my period turns up, but has any one gone tho the same thing? felt sure they was preg but the test say no?