Ahhh sayang, ini memang boleh jadi normal di early pregnancy especially 3-4 weeks, hormones masih naik turun, urine concentration pun boleh affect hasil test. A few of my mum friends had on-off results jugak at that stage, so you're definitely not alone! But since the line is coming and going, best la you repeat the test in a few days or go see your doctor to confirm dengan blood test, dia boleh detect hormone levels yang lebih accurate dan boleh reassure you properly. Keep the test kit and go check with your GP ya, confirm the pregnancy status dulu before anything else