When should I test

[lenasibbs]

Should I test on Sunday morning with first response 6 days earlier I will be 11dpo or wait until I have missed my period?

Wait until your period is late. Your result will be the most accurate then

Yep, wait until the day your period is due.

I've just tested 4 days before my missed period and got a bfn, learn from my mistake and wait until your period is due, or maybe even late.