I have a numbness in the lower right lip/jaw, had some dental work done a few weeks ago, and got anesthesia, upper right for a filling?

Not related. This is most likely coincidental, the anesthesia on the upper would not affect the lowe lip or jaw. You should go back to your dentist and have him check it out. There must be another reason.
Check it out. Could be due to positioning of neck for filling. May want to see your chiropractor first.