Earliest you got a BFP?

I'm sure this post has been done before, but I'm curious to know the earliest you have found out you're pregnant. I'm currently 7 DPO and got a vvvvfl on a blue dye test about an hour ago. I know blue dye tests are not the most accurate, and I'm on my way to the store to get a pink dye one, but is it possible to get a true faint on a blue dye test at 7 DPO, not even using FMU? Has anyone experienced this and been pregnant? I want to be excited but I also don't want to get my hopes up. Thanks for your input! :)