The best solution will be to perform another test in the following days. Perhaps the amount of the hormone is still too low for the test to catch it - that is, it was done too early. The level of the hormone hCG increases during pregnancy (even day by day). This is best seen by performing a blood test "Beta HCG". Did you do a morning urine test? Then we have more concentrated urine and there is a greater chance of getting the correct result. If even a very poorly visible line appears on the test - pregnancy cannot be excluded. This cannot be ruled out in your case either. Useful information: https://www.gdziepolek.pl/artykuly/test-ciazowy-jaki-wybrac-i-kiedy-zrobic