Ay mama, ganyan talaga ang lutong hCG sa early pregnancy, sobrang confusing! A few of us din dito may similar experience na faint line then negative pero buntis pala, lalo na if testing too early pa lang or dilute ang urine, kaya sige na, follow what your OB said and retest after a week para sure na. The fact na 8 days delayed ka na and your doc is already treating it as pregnancy is actually a good sign, so stay positive and take care ng sarili mo in the meantime, avoid stress at heavy lifting!