Face has drastically thinned in a couple of months without weight loss? Sagging jowls? (photos)

a couple months back i posted about sagging jowls - however I;ve recently discovered that my face has seemed to really have thinned out within these past two months, but I haven't lost any weight in other areas. Any ideas as to why, could stress be an indicator? Does this look like the start of jowls? I have a really sharp jawline with no drooping, when seen from the side, so not sure what it could be. Also have been employing lots of facial yoga so maybe that has thinned it out? (I am 25 going on 26)

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