"It is recommended to take a pregnancy test on the first day of the expected menstrual period. However, pregnancy tests of varying sensitivity are available in pharmacies. The sensitivity of the test means what the lowest concentration of hCG it is able to detect. Tests with a sensitivity of 10 mlU/ml, the so-called ultra-sensitive tests, detect pregnancy as early as two to three days (e.g. Pink Super Sensitive Test). However, it should be borne in mind that fertilization can occur even 3-5 days after intercourse, so the test should be performed no earlier than 6-10 days after intercourse. Tests with a sensitivity of 25 mlU/ml (e.g. Pre-Test) are also available, which should be performed no earlier than approx. 14 days after intercourse."
Depending on which test you used supersensitive or lower-sensitivity, you should interpret the result. Taking into account the above information, yes, it is possible for the pregnancy test to show a normal result 4 days after intercourse. To be sure of the test result, it is best to repeat it in the laboratory and confirm the result at a visit to the gynecologist.

In the following article, we have described how and when it is best to take a pregnancy test:

https://www.gdziepolek.pl/artykuly/test-ciazowy-jaki-wybrac-i-kiedy-zrobic