What and why did this happened?

i did carotid (the hair straightening thing for about 3 months) three days ago and i just took a bath with wetting my hair. they said i was supposed to keep my hair competely dry for 3 days and i think i did, but i when to this anime convention and wore a wig. but i didn't crumple up my hiar. did the sweat make it wet? after i took the bath, my hair is now pretty curly. can i reverse my hair back to straight for the next 3 months??