late period

Cassadi
So according to this app my period is 7 days late. I took a test 6 days ago and it was negative. I'm having light white discharge and I don't really have any symptoms. Is it possible to be pregnant when i tested like 6 days ago and got a negative and don't have many symptoms? 
Day 10 w/o period. 
No symptoms of pregnancy or period. Light white discharge??