Had dental abcees tooth extacted. Finished antibiotics a week ago. Feel faint legs tingly and as if being touched. Possible cause?

Unusual. Not sure if there is a relationship between the various issues, since I really don''t know how bad the infection was. It would be a good idea to have the dentist that removed the tooth check on you, share your additional sympthoms with him/her and perhaps have them speak with your physiciain to determine if ther is a relationship. Typically there would not be, but should be checked none the less.
Call dentist. If your tooth was just extracted and you are on pain medication, this may be a side effect. If the extraction was a while ago, it may be something else. Either way, I would call the dentist you saw and ask for their guidance.