Mandelic acid (50%) peeling done (against will!) at beauty salon in foreign country, very scared, help please!

Yesterday I went to a salon to get a "facial". At first I felt a little burning but then I felt a strong burn. They applied a peeling solution of mandelic acid at 50%, and left it for about 5 minutes. My face was tight and stinging so I went to the pharmacy and got some panthenol. Today my skin does not burn so much and is not as tight, but it is more red/brown and it is starting to it itch....is this normal?? what sort of care should I provide to my skin now?