HELP I NEED GOOD ADVICE I MIGHT HAVE............?

okay im a girl and ive been fooling aroung with this other girl mya for about 5 months now sooooo yesterday i gave her oral sex but i didnt let her "orgasim in my mouth" but after wards today i told my friend and she told me about the rumor about mya being easy and having a std? but she siad it was a rumor??? while ii was doing it nothing seemed out of the ordinary she didnt have any..."bumps or anything" should i be worried!!!?? or should i pass it of as a rumor