I have a weak chin, an egg shaped face and my maxilla is recessed. Options? (photo)

I appreciate your questions and photos. It does appear that you would benefit from augmentation to the chin, which is best performed via customizable chin implants. These biocompatible devices come in different shapes and sizes that allow us to create a proportionate, natural look for every patient. The implant is placed through an incision in the mouth so there is no visible scarring after the procedure. Chin implants can last many years or even become permanent fixtures as long as you never experience problems or decide to make changes to your profile. 
It is difficult to tell from the single photo whether additional enhancement would be beneficial for your overall facial contour. I recommend scheduling an in-person assessment with a board-certified plastic surgeon who can examine you more thoroughly and customize a surgical plan to meet your precise needs best. 

Presuming you have an adequate occlusion and there is no benefit to orthognathic surgery, it would be of aesthetic benefit to augment your entire jawline and midface. (infraorital-malar- maxilla) This is most effective done using custom implants which can be deigned to cover the bony surface areas needed to create a major facial reshaping effect.