TTC and google is confusing me

My husband and I recently decided to start trying. I have started using ovulation test which seem to help understand my cycle. I'm 6DPO I think, how do you ladies get your DPO accurate? We baby danced 3 and 1 day before my positive OPK but idk if that's enough. I figured we would stop trying and quit stressing but how do you know to hit the right date if you stop trying ?