How long do i wait ?

Af was due last wednesday, 7/22, and i still havent started my period,havent tested since friday but it was negative. I have no signs of Af and the only pregnancy symptoms i have is im tired alot,been having headaches and sinus problems,(not sure if that is even a symptom but im just saying). Until today,since the 17th i had ewcm. So in your girls opinions should i test again soon and how much longer should i wait till i call my obgyn to get a blood test or something ?