Forehead acne

I noticed on my forehead there's like a few bumps but I'm not sure if it's a blackheads or whiteheads because whenever I tried to squeeze it, there's nothing come out, because usually if its whiteheads there will be like a white thingy right? So I'm not sure what's it is 😭 currently I'm on adapalene so on my cheeks and my chin barely had acne I don't know whats go wrong :( I even use salicylic acid, glycolic acid toner on my forehead and it doesn't reduce at all. I even double cleanse. I'm planning to try paula choice SA 2% or cosrx blackhead power liquid. Does anyone has tried this two and is it good?