Ay hirap talaga ng waiting game na yan, friend! So technically December 11 is around 7 days pa lang from December 4, which is really early pa for a PT to show positive, most of us need to wait until after missed period para accurate talaga, kaya negative result doesn't mean hindi ka pregnant yet. The light bleeding you had could be implantation bleeding, pero honestly kailangan mo na talaga mag-follow up with your OB para ma-rule out any concerns at ma-check kung ano talaga nangyari, lalo na kasi di ka pa nag-delay, they might want to do a blood test which is more sensitive than PT early on. A few of my mum friends had similar experiences na delayed ang symptoms or weird patterns bago nag-positive, so just wait pa till your missed period and retest, pero doc visit talaga ang best move para may peace of mind ka. Keep us posted, sending baby dust if that's what you're hoping for!