Sayang, faint line at 12 DPO tu memang dikira positif, HCG hormone baru je mula naik pada peringkat ni, so jangan risau sebab line tak gelap lagi, it's actually very normal. Ramai mak-mak yang I kenal pun started with a very faint line at 12 DPO and went on to have a healthy pregnancy, so faint doesn't automatically mean chemical. My friend pun experienced the same thing after her loss, she kept testing every day and watched the line get darker gradually, and she's now well into her second trimester, alhamdulillah. I understand your fear after what happened in December, that anxiety is so real and valid, but please give yourself a little hope sebab this could truly be your rainbow. Doakan yang terbaik untuk you, and do follow up with your doctor for a blood test to track your HCG levels, that will give you much more peace of mind than the urine test alone.