Dunno what it could be

So I’m 16 days past ovulation 3 going on 4 days tomorrow for missed period and I’ve tried BLUE DYE test and gave me a FAINT POSITIVE! So. I bought first responses PINK DYE and gave me negative results 💔😔 so I don’t think my period is gonna come because i don’t have any symptoms of it coming at all , i just don’t know if I should wait a few more days then re test again but I don’t want another negative 😕