Early blood test?

TtcMommyof1 • Wife to a wonderful man ❤️. Mommy to an amazing 6 year old girl 💕. Due 11/8 with a baby boy after 37m ttc💙
I'm scheduled for my pap tomorrow at my OB's office. Since I'm ttc I'm hoping she will also go ahead and give me a blood test. I've read online that blood tests are accurate as early as 6 to 8 DPO. I  will be exactly 6dpo. Has anyone else had luck this early?