Find out just how bad or how good it is. You must have a starting point to make a change.
Just a note - Doctors have changed their thinking (what again) and are now looking at the waist-to-hip ratio as a better indicator of obesity rather than the bmi. Easy to figure. Just measure your waist and hips and divide your waist measurement by your hip measurement. If it is over .85 you now have confirmation of obesity - unless of course you are pregnant.