hello and welcome to hcm forum,
i am glad you wrote in, first of all the tooth which is hurting you the most needs a dentists attention first, the numbness
on the lower lip and chin is most probably due to the infection present in yo,
ur lower tooth, i cannot rule out the cause of infection and pain until checked clinically, but can assure you that it is nothing serious,
do not floss too much, instead rinse your mouth with an antibacterial (betadine
) mouth wash or warm saline water.
also take an anti-inflammatory for temporary relief of pain,
kindly visit your dentist soon.
i wish you good health,