The sex workers in Amsterdam are routinely screened for STDs (by law). You would know whether the condom broke - your penis would have been fully exposed when you withdrew. Because you had protected sex, you do not need testing - unless, of course, you develop symptoms of an STD. The symptoms you describe are not characteristic of an STD based on your experience.
do you think that i should check for std's at a clinic nonetheless, or should i just leave it be?
It is doubtful. It usually takes a bit longer for symptoms of std to show.