Hormonal acne?

I just went off Ortho Tri Cyclen Lo about three weeks ago, and suddenly I'm getting tiny little red pimples on my chest again. They disappeared after I started taking birth control two years ago. Oddly, my face is still pretty clear.

I would assume that because the cause of my acne is hormonal, that a different technique would work better to combat it. Have any women successfully dealt with body acne that they knew was caused by hormonal changes and how?