Dream of waist trainer

Waist 
To notice your waist in your dream suggests that you are concerned about your diet or weight. The dream may also be a pun on "wasting" time, money, or some aspect of your life.

You paid for it so use it. It'll take time and it will hurt, but we as females always do something that's painful. So keep it till this time next year and you will a new person and you can keep it on, because it will not hurt as much.