hi, 2 days ago i went to the dentist to get my 4 cavities in the upper front teeth fixed, they gave me novacains n made me wait for it to kick in, then he started drilling i stopped him cuz i could still feel it. more novacane; then it was painless. after i got home from the dentist the novacaine was pretty much gone. and the areas that he drilled on my teeth are find, but where he put the needle in my upper lip were very painful. i cam feel it into my sinuses and ive had major headaches since. and the one part on my top lip still doesnt function right. it hurts. can anyone plz explain to me what it going on with this?