What's the earliest you've gotten a BFP?

Nicole • Married 3 years! 💞 TTC for 3 years. MC 11/15. BFP 3/16. First baby due December 1st, 2016!!!
Ok ladies, 
As I've mentioned before in other posts, we've attempted a cycle on our own during this cycle while we wait for my next cycle (which should begin around the 15th) of January. 
I took my last two Ovulation prediction tests (the stick kind from my naturopath) on Monday and Tuesday last week (28th & 29th) which both came back pretty positive. 
My birthday is on Friday and we have a dinner our with some friends planned Saturday. I plan to take a pregnancy test Saturday morning to be sure which would be 11 or 12 dpo but I'm curious what the earliest anyone has gotten a BFP before? Do you think it would be too soon!??