Question about testing

Katie
Question!
With my daughter, I didn't get my BFP until AF was 10 days late (all bfn's until 10 days late!) 
This is our first month TTC #2 and I am really wanting to test early this time (the two week wait is the WORST!)  
Have any of you ever taken long the first time to get a bfp but tested early the second time and got the bfp?? 
I just don't want to set myself up for disappointment. I am currently 8dpo, af due in 7 days!