Really bad breakouts?

over the past few weeks, my face has been breaking out so bad! I usually have have a few zits on my chin (I am a teenager it's expected) but lately I've been breaking out really bad not only on my chin but my forehead and around my mouth. i've haven't changed my skincare routine very much (i i use the clinque 3step in number 2, except for one week when i was on vacation and i used a nuetrogena scrub that i used before i got the 3-step) what could be causing my horrible breakouts? and do you know of any products I can use to help?