Did I cause burns during my 18% TCA at-home peel? (Photo)

I have previously done 2 successful at-home TCA peels: one 12%, one 15%. I did the 18% last night. Within 30 seconds, inexpwri need rapid frosting over much of my face. I neutralized with baking soda/water solution. Now I have dark brown spots and streaks. I don't recall having these brown spots right after my other peels. I do have some sun spots, adult acne and acne scarring. I have attached pictures. Is this normal? Have I burned my skin beyond the layer that will eventually peel?