Help! 3 Weeks in Flowering Leaves Curling & Turning Purple First Dwc Grow

View attachment 1624371View attachment 1624370View attachment 1624369View attachment 1624368I HAVE TWO PROBLEMS
THE EDGES OF LEAVES TURNING PURPLE
LEAVES CURLING DOWN & INWARD

I WENT TO TURN ON MY LIGHTS THIS MORNIN AND THIS IS WHAT I SEE. ANYONE KNOW WHATS WRONG ?


I PUT MY AC IN TWO DAYS AGO(MAYBE MY TEMPS TO COLD)
I CANGED REZ YESTERDAY(OVERFEEDING-UNDERFEEDING

Over feeding thats called the claw cut back on your nutes but first I would do a flush