need advice. I'm 5'3 about 165-170 lbs but I hate how my clothes fit &amp; I want to lose about 20 lbs... I went to the gym about 4 times a week in April-June of this year &amp; I felt I was working really hard.. &amp; I was dieting about half that time &amp; I still saw no improvement. I'm totally lost most of the time when I go to the gym so I started jogging. well that was extremely hard, I'm a smoker and I can't run a mile before I start literally gasping for air not to mention my knees &amp; ankles start feeling awful as well. HELP ME! 