What do you guys think? Help !

Dena
As of today 6/12 I am cd32 17dpo and 3daysLATE, AF was due on 6/9 (Thursday) and she's a no show. I took a FirstSignall fromWalmart on the day before my expected period and I saw a extremely faint line . So I open the cassette and held it under a light so I saw this. 
Is it a evaporate line or a positive? 
Because this morning I took a Clearblue Digital and got a Negative
At this point I don't know? I'm so distraught and confused my period is NEVER late, NEVER. 
I made an appointment for tomorrow at the Drs hopefully I get excellent news . 
I have nausea fatigue headaches