Thanks for sharing your concern.
If the treated tooth was asymptomatic then there is nothing to worry about.It will not cause any pain to you.
but if the tooth was symptomatic, then it might cause pain upon air pressure.
Also as your dentist
suggested, it cannot be saved anymore then,you can just get it extracted and fixed with bridge in its place,whenever you are comfortable with the treatment.
presently you can continue with your activity without interruption.
Hope it helps.