Pregnancy testing and dpo

Princess

Gdm ladies quick question ?

If u don’t get a positive by 9dpo does that mean u are not pregnant . I’ve been testing in the morning with early response 6 days sooner and they are negative . My period is due in the next 4-5 days no cramping , but my tempts are still elevated . No signs of being pregnant but sore boobs . Starting to feel down 🤦🏾‍♀️