Test question..

So I took a blue dye test this morning, it's all my husband could find, and I looked at it about the 5-6 min mark, faint line and it was thick, full line, none of this half line like most blue eyes do. But it's faint. Yesterday I was neausas, wasn't hungry, super sleepy. Today my symptoms are less but still there but now I have small cramps and for some reason I smell cigarettes (nobody smokes here) my stomach itches and my nipples itch. I don't know what dpo I am as my periods are irregular. When should I test again to see if this was a true positive??