posture problems

I do this weird thing when I sit. It’s because I’m really self-conscious of my stomach, and I think it makes me feel better (both in my head and physically). I sit with my gut, like the middle part right at the belly button, jammed up against whatever desk/counterspace/hard surface I am at. So it forces me to have good posture, and for whatever reason I think it pushes in the belly that has just been forming consistently since I graduated college. It’s weird really, and after a while it kind of hurts – both my back and my stomach, but I cannot stop doing it. Whenever I’m at my parents house I stand like that in their kitchen at the counter, and even more so here at work. I’m so self-conscious of it. I cannot get rid of this belly no matter how toned/in shape I am. Its always a bit bulbous and bigger that I would like – as if every single thing I eat goes RIGHT there. My legs are hot, my arms are skinny(ish) and my butt isn’t too wide/jiggly – its just really small and non-existent. So unfortunately it just seems like my cross to bear to have a wiggly jello belly because the other stuff is so easy to get into shape. It just doesn’t seem fair. but i guess that means i just have to go work harder at the gym..