Burned skin, burning sensations - one week into Tretinoin gel application. Why is my face burning? (photos)

It's been more than 1 week since I started applying Tretinoin gel 0.04% w/w (as microspheres). I apply daily at night after face wash and applying Tea tree toner. I apply pea size amount on one cheek and same quantity on other. Recently, it started tingling sensations when I applied this. Yesterday, my skin near nose and lips started peeling off, I peeled my half peeled skin which left that area resembling like burned skin. It's also burning a lot over there. I am really worried, plz suggest.