Hi.. Several Months Back I Had Four Fillings Done And

Hi.. Several months back I had four fillings done and the dentist seemed to had done a good job but days after my gums hurt in between the teeth. I went again but they didn't find nothing wrong but I have extreme pains and after a few days of this my tongue and jaw been acting up. Tongue feels swollen, and my jaw feels weird just beneath the chin. Any idea as to what it may be? I been feeling really awful included having fevers