Eh tunggu, 4 weeks baru lagi kan, clearblue digital tu mmg akurat tapi kalau terlalu early boleh dapat false negative jugak, especially kalau hCG level still rendah. Better you wait until you miss your period or maybe do another test dalam 3-4 hari, sebab timing tu important for accuracy, a few of us tried testing terlalu awal and all got negatives even though later kena positive hehe. If you're really worried, just go see your gynae, they can do a blood test which lagi reliable for early detection!