Ahhh I totally get the frustration, testing guna TTC kan memang timing is everything! Biasanya paling akurat kalau test pagi-pagi guna first morning urine, sebab hormone concentration tu paling tinggi time tu, a few of us tried testing at different times of day and memang pagi je yang clear. Masa period supposed to come atau a few days after tu adalah best timing, sebab sebelum tu hormone belum cukup tinggi lagi to show up on the test. If you're still seeing one line, boleh tunggu a few more days and test again with fresh urine, tapi honestly after a few attempts dengan negative results, best check with your doctor just to make sure everything okay and maybe they can do a proper blood test for you. Good luck, dear!