Do I have a weak chin? (Photos)

Based on these photos I would not consider your chin weak. However, in person evaluation will give much better chance to evaluate potential deformity and suggest appropriate treatment. Consultation with a board certified plastic surgeon with good reputation in chin surgery and facial rejuvenation should be your next step. Good luck.

  From the side profile photograph, there does not appear to be a weak and  recessive chin profile, so its best to leave well enough alone.  For many examples of before and after chin implant patients, please see the link and the video below