Sayang, kalau dapat double line even though line ke-2 samar, it's still a positive, but sebab situation mu ni a bit unclear (period patterns berubah, lines samar), kena go see your doctor or clinic ASAP to confirm dan check everything okay . Jangan delay ye, better to be safe. A few of us mum friends pun pernah dapat samar lines, and some turned out positive, some tidak, so doctor can do blood test to confirm properly. Pastu dia can explain why your cycle berubah. Take care!