question: I have had a root canal 6 weeks ago...the day after I began with numbness in my lip which spread to my chin.....I was put on antibiotics and pain pills...I landed up in the hospital twice after that...one for pain and dehydration and the other for an infection that started to spread down my throat from the root canal....6 weeks later and no feeling in lower lip or left side of my jaw...what is going on?