Why is my face so thin? What can cause this?

even though i sound heavy for my height, 5'-9.5", i don't appear as heavy as i am. i used to be physically active most of my life, weight training, some aerobics, still considered to have a muscular appearance, but i've become rather inactive last couple years. when i last weighed myself, i became alarmed, because i had thought i had lost weight instead of gaining weight. i am used to being about 180-183, but at 193 i thought i looked more like 175-178. my face has become sooooooooo thin the last year, but my abdomen is bigger. everywhere else, the weight seems to have stayed off, too. i'm very concerned that something is wrong, why would i be losing weight on my face? my face wasn't exactly fat or anything, but now people are starting to comment that i've lost weight (especially if they haven't seen me in awhile), when in fact i've gained a lot of weight?!?
i feel fine overall. had a preliminary checkup with my doctor, they did some blood work, general stuff, but the test for diabetes came back normal i guess, no concerns there.
can someone let me know why there's this shift in my weight, and why my face is thinning?