Hey mama, 9DPO is still quite early kaya ang hCG levels ay mababa pa, most test strips need higher levels to show a line, so kahit negative pa ngayon ay hindi pa talaga conclusive! I'd suggest testing again in a few days (like 12-14 DPO) when your levels are mas mataas para sa clearer result, or if you want to be super sure, pwede mo ding i-check with your doctor para sa blood test na mas sensitive talaga. Fingers crossed for you!