If I have a deviated septum (I think). Will it affect dental implant surgery I will be having in two weeks?

Unless you are getting the dental implant surgery under general anaesthesia or sedation, Deviated Nasal Septum has nothing to do with Dental implants and their placement. Good luck with your Dental implants surgery.

as u said 'i think' means u do not have any active symptom of deviated septum [ eg. nose bleeding, facial pain] . there is no relation between deviated septum and dental implant surgery. u can go ahead.

Deviated septum should have anything to do with having dental implants. If you are having sedation make sure you can breath through your nose. 

No it would not affect nothing, on the procedure or setting.so do not worry,everything should come out right if there is enough bone.