Is this reaction from my 20% salicylic acid peel normal? I feel intense burning and redness. (photo)

I recently purchased a 20% Salicylic acid peel off of Amazon. I had done the process right the first time around, with no problem but with no results to show for it. The second time around, I forgot to 'degrease' my skin with rubbing alcohol. I felt an intense burning around where it's reddest in the picture I attached. I previously had a minor sunburn, but I thought it healed up before I applied this peel. Please let me know if I need to seek medical/professional help.