I know your pain, for some odd reason everytime a con comes up my face decides to break out. I have found also that nothing workd on my face, the only thing I've found that worked for me is
FreeMans Facial Clay Mask-Avocado and Oatmeal works wonders on my face, if I'm breaking out, or starting to, I use it and the next morning my face is much better. It's hard to find this stuff, its only really sold at certain pharmacys but it works really well for me, I cant say if it will for you though
the stuff looks like this
http://pics.drugstore.com/prodimg/20971/300.jpg