I had a composit filling come out and i have not had it fixed and now i have a slight numbness on the right side of my face can this be caused by the tooth ?

Possible: You may be getting an abcessed tooth or infection. Sometimes swelling from an infected tooth can cause a feeling of numbness. See your dentist asap.

Maybe: When a tooth is left exposed without a sealed filling, decay can quickly progress into the nerve. Your symptoms may indicate the beginning of an abscessed tooth. See a dentist asap!