Is It Normal for Numbness and Tingling to Start 2 Weeks After Getting a Lower Wisdom Tooth Extracted?

What you're probably experiencing is mandiblar nerve paresthesia, which sometimes occurs because the nerve to the lower teeth, cheek and lip are so close to the wisdom tooth that there was some trauma to the mandibular nerve during the extraction or infection after the extraction that affected the nerve.  This is most commonly a temporary issue and heals over time.  However, IT IS EXTREMELY IMPORTANT  that you return to the dentist or oral surgeon who extracted your tooth for him to evaluate your numbness.  Usually there is no charge for doing this, as most dentists will consider this a normal post surgical visit.

Usually the dentist who did the extraction will do follow-up treatment at no charge. You need to be seen, Swelling pressure on a nerve can cause the numbness. Please have this looked at immediately

Although its unusual to have syptoms begin 2 weeks after, it sounds like you have partial parasthesia possibly due to some nerve damage during the extraction.  See your dentist.  Many cases like this resolve withing 6 months - 2yrs.