My face is pretty clear, but no matter what I do I can’t get rid of the mild acne on my chin. I wash my face all the time, use Differin, and clean & clear moisturizer, and it works for everything but my chin and neck. Any help here?

I recently stopped taking the birth control pill because it was making me throw up every morning. Although the acne I had BEFORE I started the pill was not changed initially, now that I have discontinued the pill, my face is breaking out. Is there anything I can do to stop the acne? I use Differin lotion and a topical antibiotic (which have worked very well in the past), I have dry skin and seborrheic dermatitis, and I am allergic to benzoyl peroxide.
Do NOT be one of those people that copy-pastes the first link that came up on a search that tells me what acne is and gives advice that everyone has heard before. I know what acne is, moron, and I know how to use a search engine, so please don’t bother.

I have very little acne of my chest. I went to the dermotologist and he recomended an exfoliator and a cream which is titled differin which is .3% adapalene gel. So ive begun useing dove mositurizing exfoliation and this cream… and the acne got worse!!! are there any home remedies to make it go away besides toothpaste?? thanks!!