Sorry to say, but since your current weight is over 300 pounds-there isn't anything a face muscle gizmo or anything like that is going to do for you.
My best advice is to get a photograph of you at your STARTING WEIGHT, and put it in a little album-and write your weight on it. You have already lost 19 pounds (congratulations!!!!!!) so it would be a wonderful idea to have someone take another photo of you when you hit the 20 or 25 pound marker-and then compare that photo to the first one. Keep getting a photo taken of yourself after every 15-20 pounds, so that you can compare the photos!
It's hard, especially when you have a lot of weight to lose, to see the changes in yourself when you look in the mirror each day-but when you see a photo of yourself at your heaviest, compared directly with one that shows you after a 40 pounds loss-you are DEFINITELY going to start to see the changes!
luvja HAS INDEED slimmed her face a lot in the past few months (she often has new pretty avatar pics to show her cute face) and she has went from 342 to 272 and is looking fantastic! As you lose weight-YOUR face and chin will slim down as well!
It will happen, just be patient!!!!
Start weight after baby #3: 233.9
Current weight: 143
90 pounds lost!