Post acne skincare

26F here! Oily skin. I was following a skincare routine religiously for the past 4 years involving a gentle facewash, niacinamide, salicylic acid( night time) moisturiser and a sunscreen.

I got acne recently. This acne outbreak was sudden and kept on increasing on my cheeks and forehead. Started like closed comedones and transformed into pustules. This went on for 4 months and finally decided to consult a dermatologist. I was prescribed 20mg Isotretinoin for my acne. But it was only for a month ( 2 weeks daily and 2 weeks - alternate days) . He told me not to use moisturiser, sunscreen or anything during the treatment. My skin got very dry and was burning. Now that my skin is cleared up, I’m trying to start a new- basic skincare regimen. Would my acne comeback as tretinoin course was this short and now that I’m planning to apply products on my skin? Suggestions please!

Pictures are in latest to oldest order.