Pro Active

I wanted to try to clear up my skin a little before the big day.
I pass a proactive stand at the shops every week, and at 3 months to go i decided to try it and go from there. I dont break out a lot but i get spots chin/cheek/neck every month ( which can take 2 weeks to go away) and quite a bit on my bust ( big boobs, exercise etc ).
So i have been using it for ... would have to be about 4 weeks so far.
Initially it seemed to work on my face well, no spots at all for first couple weeks. after the first week, i went back and got the stuff especially for your body but that doesn't seem to work at all for me.
anyway, when ever i don't follow the routine perfectly - eg forgot to moisturize once - i break out - now i have a spot right between the eyes that is still there after two weeks of using it. I tried treating the spot specifically with the stuff - no response i have avoided thspot for the last day or so and it seems to be fading. I do have really pale skin so it shows up ( to me anyway) quite a lot and i do scar very easily so i can still see the spots some times even when they have pretty much healed.

Anyway, it doesnt seem to be working as well as it did initally, so i wondered if anyone out here had used it and had advice or experiences to share?