I don't think so, but you can test it by taking a video and put your finger over the bottom microphone hole and make some noise. If it sounds normal when you play the video back than you know that there is no issue. Good luck.
You can test it by downloading Samsung's voice recorder app from the Galaxy app store. Then record something in interview mode. I read that the mic hole is L shaped, so you probably didn't do damaged. I know "someone" that did the same thing one night.