When should I test?

Tabatha • Pour some baby dust on me

My period is in 6 days. I’m a super impatient human. When should I do a pregnancy test that is more likely to be accurate? I took one yesterday morning and this morning and basically got a negative. I’m using the 88 cent ones from Walmart so it’s not like I’ve dropped a bunch of money into tests. I just am so hopeful so I keep checking.