When should I test again??

mi

My last period was August 6-10, but it was 2 weeks early but was still the usual 4 day period. . So now I’m a day late, I don’t want to waste money and keep testing early. I tested this morning and it was negative. I have had none of my usual period symptoms. last week I had a few hours of super super light spotting ( didn’t show up on my underwear, only when I wiped) if i tested negative this morning when should I test again?? Thanks!!