I've very regular and never missed a Period, however, in the past few months my cycle has been every 26 days on average. That would make me ready for AF this past Saturday, Monday for 28. I've taken 2 first response tests and gotten faint lines. I took 2 EPT test and got a BFN. I'm supposed to be 16Dpo. No sore boobs but I'm a bit sluggish and am peeing every hour. Could it be? How long should I wait to take another test?