NEED HELP!!

Recently the pistols and bud started to turn this color its strange ive never experienced something like this. Is it done? Getting burned? Not enough nutes? Its an autoflower of bubblelicous but i havent seen bud turn this perticular color should i cut it down????? Did i bot give it enough nutes? I saw the pistols changing color not to long ago so alls i did was give it water to flush it all out so it can finish but then this happened 2 days after i stoped feeding