AF was due Monday and still no period.

Shonda
So my af was due on Monday and ever since I started the period calender I haven't been late by more than a day maybe two. But I still haven't gotten my period. I don't even feel it coming either but at the same time I don't feel any pregnancy symptoms either. But then again with my other 2 pregnancies I don't remember feeling any symptoms until I was like 8 weeks along. I took a pregnancy test yesterday (clearblue plus) and it said negative. How long again should I wait to test again? Or am I testing to soon.