negative results

So I took my test 7 days before my missed period (so says glow). I been feeling nausea the last 3 days so I felt it was maybe ok to try. any positive stories out there? I know I was dumb taking it so early and I didn't take it first thing in the morning either (also dumb). I just wanted to know. :-/ also used Wal-Mart brand. said can tell 5 days before your missed period. but in the papers when I open it it claims 4 days??... any positive results for any of you out there? we have tried for 6 months and I can't be let down anymore. 😔