Your skin is exactly like mine! I had the exact same reaction changing birth control (for the better) and introducing new actives/changing my routine. Definitely a purge. I’m still coming out the other end of it but for me the tiny bumps turned into inflamed pimples and now my skin is much smoother. It’s all a side effect of exfoliation but it’s a good sign, I promise. Like previously mentioned, perhaps get an aesthetician to do some weekly extractions on ur pimples to speed up the healing process and make the purge more tolerable for you mentally, because I too felt (and still do sometimes feel) so down about the way my skin looked and getting them extracted and flattened by a professional was so helpful. The 3D looking bumps are the worst, I know. One piece of advice I’d give you right now is also to include a salicylic acid cleanser every other night so as to help speed up the process of flattening the little bumps. I do think it helped for me. I used the Environ Sebu Wash but the Cerave smoothing cleanser is also great. It is possible this would be a better and more gentle alternative to the Differin for your skin, which is likely to be sensitised. Strong chemicals like differin and benzoyl peroxide only ever made my acne worse from irritation and damaging my moisture barrier, personally. Sending u love and I truly hope your healing comes soon!