Aiyooo stress pun boleh delay period, especially kalau you've been worried about it! A few of my mum friends pernah experience yang sama, delayed tp negative test, then period datang after a few more days when they relaxed sikit. Tapi kalo dah hari keenam and still negative, probably good idea to see your doc just to rule out anything else, sebab sometimes there bisa be hormone issues or other things juga.