I think I burned/dried out the area of where my pimple was turned I think from applying too much medicine area burned, advice?

I think I burned the area where the skin was heeling, maybe I put to much medicine on and my skin couldn't handle it? not sure but now i see discolor on my skin near the area. The area looks different best way to describe it is old dry skin but i think i may of burned my skin in the area. I am not going to continue to put the medicine on but should i put a lotion on so the discolor goes away? The area is red/brownish. I have a wedding Friday and I am freaking out because i can notice please help

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