Dr. Trenkle is a true professional. I came to him for my lip fillers and he was able to give me exactly the look I was after, a noticeable change but not over the top. In a city like Los Angeles it's so important to find a provider who will actually take the time to listen to their patients rather than doing what they want and what is popular in the moment. Now I don't trust anyone else with my face, and he's helping me address my acne scars and pigmentation issues with a laser treatment regimen!
You can definitely use the same syringe for multiple areas of the face. As the above answerer mentioned, each filler is unique and some are specifically designed for lips and others for cheeks, but as long as your injector chooses a product appropriate for both areas you can use the same syringe for both. You also have the option of using half a syringe during your initial visit and saving the other half for when the filler inevitably wears off!
There are several options for non surgical tightening of the lower face. I would personally recommend a series of treatments with the Titan laser, which was designed specifically for the treatment of loose or sagging skin. If the issue is simple with the laxity of your skin a laser treatment should be sufficient, if you are concerned about the previous chin implant you received a revision surgery with a smaller implant may help to make the overall appearance more natural. Hopefully this answered your question!
It is not known if Kybella passes into the breast milk, for this reason it is recommended that you wait until you are done breast feeding to avoid any potential transfer to your child.
If you are not satisfied with your results, you should absolutely tell your surgeon. As long as you didn't go into the procedure with unrealistic expectations, you should be satisfied with your results. There may be something your provider can do beyond the surgery to enhance those results, or at the very least you can both compare your before and after photos and have an honest conversation of where to go from here. Based on your photos I would think there are several non-invasive options to help improve your skin laxity, the Titan laser by Cutera or even Ultherapy being some of them.
Based on your photograph I would say you are a great candidate for dermal filler. One of my favorite for non-surgical chin augmentations is Voluma, which we price at $700 per syringe in my practice. I've had great success in enhancing profiles similar to yours with that product.