I want to feminize my face a little, especially in the jaw and chin area. Botox or Surgery? (photos)

Facial feminization for the female. For you this would be a conservative rhinoplasty with hump removal etc., a chin reduction and forehead reduction.  During a consultation a surgeon needs to find out exactly what your goals are and not impose his aesthetics on you. Look for a very experienced FFS surgeon who does natural faces and not the overdone strange look 

Thank you so much for your question regarding botox.  Botox
injections to the mentalis muscle would relax your chin and create a
softer appearance.  It would not require many units.  If that did not
give you the results you were looking for you could progress to dermal
fillers.  I believe botox alone would offer the improvement you are
looking for.  Of course I am not able to tell via pictures for sure if
this is the correct treatment for you. 
I recommend an in person consultation with a board certified provider for a proper evaluation.