I used to feed myself when I was actually thirsty. The I knew I was feeling thirsty and not hungry. Or if I was out of sorts I would eat but all my body wanted was a nap. It takes time to work it out. When you feel something stop and ask yourself "what am I really feeling?" You will work it out. Maybe swap every second cup of coffee for a glass of water (I even have hot water from the kettle when it is cold). It can never hurt to get your blood sugar levels checked out.

Good luck.