Baking soda. It's an all-purpose ingredient. You can use it for cooking, baking, your skin and cleaning. If I ever stain the toilet, and the toilet cleaner cannot clear the stain, pour bicarb in it and in 2 seconds it will look brand new. It's not a herb, but a miracle potion.
I'm not saying that bicarb would stop acne, but it prevented Dad from having pimples, and I've never had acne before, but I hardly use bicarb on my skin, I wouldn't know. What I normally put on my skin is Health Basics: Dermaplus Free, not sure if it is sold in America.
But I'm not sure what oatmeal is? Is it porridge? Cos porridge is a meal with oats.
And by the way, that proactiv stuff, it doesn't mean it is going to work for everyone. I suggest you never buy it again. And peroxide is bad for your hair too. If that oatmeal thingy works a little but not all, then it is better than without. Are you in your teen years? Do you constantly eat oily foods?
Also, narrow exfoliating to once a week, as shedding skin a lot can irritate your skin like something chronic. Use moisturiser twice a day, and always remember to do it after the shower, not before.
And if you like to wear makeup, try to avoid it at all costs, but if for whatever reason you have to wear it, take the makeup off straight after you don't need it anymore and definitely do not wear makeup to bed. With those wipes, and not your shower cloth.