Should I test again?

Missed my period and then on the third of oct. I went to the restroom and when I wiped there was alot of discharge and very light pink. Just that one time. And at the time I thought okay so af is showing but that was it it was just that one time and no af since. I've taken a test on the 4th, 6th, 8th, and 11th and got all negatives. Should I test again or just wait or what do you guys think?