What can I do about fat loss in my face? Is it fat loss and will it be permanent? Could this happen just from stress? (Photos)

I have lost a huge amount of fat and volume in my face over the last few months. The lower half of my face is noticely smaller/shrunken. I have nasolabial lines where didnt before and huge bags under eyes where there seems to be no fat where there was before. I have been stressed as i have post traumatic stress disorder diagnosed last year but no overall body weight loss only loss in my face. Im only 32 and suddenly look older than before. Blood tests by gp have come back normal.

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