8dpo testing?

Joana • TTC #2
Anyone get a BFP 8dpo (9 counting OD)? I know I O'd because I had O spotting for the first time in my life on CD 17, plus those piercing twinges. 
Took a HPT 6dpo (Sunday) and of course BFN
Super queezy for the past 3 days and lightheaded. Lots of cramps Saturday (5dpo) which have since ceased. AF due the 6/15