The result of beta-hCG is reliable when it is performed at the earliest on the date of the expected menstruation. If this condition is met in your case, it can be concluded that it is true. In non-pregnant women, the test result should be less than 5 mIU/ml. In a normally developing pregnancy, beta-hCG levels double on average every 48 hours and increase until the 9-12th week of pregnancy. At a later stage of pregnancy, it drops to 10-20% of the maximum value. I also enclose an article that may be useful: https://www.gdziepolek.pl/artykuly/test-ciazowy-jaki-wybrac-i-kiedy-zrobic I encourage you to watch the video: https://youtu.be/g2LhgyZi0jo