Anyone else experienced this?

Rebecca
This is our first month of TTC and AF was due on oct 8th. Never came so I did a HPT and negative. On 7 days late I had a blood test also negative. Now 12 days late and still no AF. I have no pregnancy symptoms but my AF is always right on time 34 or 35 days. Has anyone else had this? Were you pregnant and getting false negatives or did AF just finally come? 
​Thanks!