Aih, I understand la the anxiety! Kencing cair boleh jadi sebab dehydrated atau hormone changes, bukan automatically negatif test je, a few of my mum friends had false negatives pasal timing or test sensitivity. Since you're 12 days late, better check with your doctor lah, they can do blood test which is way more reliable than UPT, especially if there's other signs you're feeling. The timing and hydration level memang boleh affect UPT accuracy, so jangan stress sangat yet, go see a doctor to confirm either way, okay?