Today after a meal I had some food particles stuck in my top molar all the way in the back. I took my toothbrush and tried to scrub it out real well to get it. While brushing, I put the toothbrush real far back into my mouth to really try and clean that last molar. In the process, I jabbed the back of my mouth behind the molar a few times. A few times while brushing the underside of my tooth and going straight back and a few times brushing the outside of the tooth and accidentally pushing it further past the teeth. What is back there? And can hitting it a bunch of times cause any medical issues? I am a little worried.