dont worry, the same thing happened to me. i broke out all over my jaw ( this was last month) but now my skin is so clear. ur skin just has to get use to it and it takes a while so wait it out. good luck!
When I purchased Proactive they told me I would probably break out more at first but after a solid 6 - 8 weeks I should have beautiful skin. Keep at it and give it a fair shake. Don't forget that it takes up to 14 days for a pimple to develop so you might still have some old ones hanging around too!