RASH ON MY LEGS AFTER USING NAIR AND IT STINGS?

ive just used nair for the first time and stupid me didnt test it before i used it so now my legs just on my thighs not any lower down than below my knee has gone red and spotty and rashy and it stingsssss. what do i do and whats happened? its not done it anywhere else but there. am i allergic to it do you think :( and what do i do to get rid of it coz im going abroad tomorrow and want to wear dresses and stuff! IM NOT HAVING MY LEGS OUT IF THEY ARE RED LIKE THIS cries help please what do i do