yeah man. something people dont think much of can turn ugly.
i started training mma not too long ago. and i had what looked like a normal bug bite. it was about thie size of a pimple. then the next day it was the size of a penny. now a little over a week later it is the size of a baseball. it started out looking and feeling like a bug bite, and it turned out to be mrsa.
even if it is nothing, at the very least it will take away your worries. i hope everything is alright man.