HI I Had Back Bottom Molars Built Up With Bonding

HI I had back bottom molars built up with bonding until Im ready to crown as had ground down molars over the years and 6 veneers on front teeth ...now I have a constant sweet taste in my mouth that is overtaking every other taste...Dentist said not from him I must have changed my diet...but it started on the night of treatment...went from metallic taste then to a sickening sweet taste...