No AF & bpn

Leslie
I was due 11/6, still no signs or symptoms of AF, however I have gotten all BFN. I had my first daughter at age 20, and remember getting bfn a week after my AF was due, and then a bfp a few tests later. 
Now 10 years later we are ttc for #2 so I am tracking more than when I was 20 with our unplanned daughter.  
My question is how long would you wait to go get a blood test?