I HAVE TWO TEETH BOTHERING ME. i HAD A ROOT CANAL ON ONE OF THEM A YR AND HALF AGO. I WAS ALSO GIVEN ANTIBIOTICS FROM MY FAMILY DR. 9 MONTHS AGO FOR THE CAVITY. IT HAS A HOLE WHERE THE BUILD UP FELL OUT AND A CAVITY. THE MOLAR BEHIND IT HAS A LARGE HOLE/CAVITY AT THE GUM LINE. COULD THIS BE CAUSING MY CLOUDY HEAD FEELING, FLUTTERING/ PRESSURE IN MY CHEST,AND NAUSEA. I AM VERY WORRIED AND I AM WAITING 3 WEEKS FOR MY INSURANCE TO TAKE EFFECT. SHOULD I BE WORRIED ,SEEK MEDICAL ATTENTION?