10 days late

I'm 10 days late all test bfn. ( will be testing again tomorrow I waited a week)
​I know this is stupid to ask but cause I haven't had AF then I can't ovulate yet right ?? 
But because I was due on the 15th and Af  hasn't arrived yet I was meant to start ovulated processes yesterday but I have no idea what to do to? 
What keep trying? Or wait till i go see my doctors next week??