Latest DPO?

Natalie
What are the latest dpo that youve had a bfp? I think im 14days Dpo. My period is due today. My boobs were really sore but now they're not...and im having mild cramps. Af due today...nobaign as yet. Am intesting too early. So far I've had 3 bfn and i dont know if i should give up hoping for this month