Do Auto's stop growing in height when they start to flower

Does anybody know if auto's stop growing in height when they start to flower or do they just grow to the light. I am worried that my auto berry's are not going to stop growing. They are currently about 1 inch away from my cfl's and i dont know what to do. I dont have any more room. Also is it to late to add a screen so i can scrog or is there no point?

I've heard its not good to top AF strains, I thought it would just effect ur overall yield, LST is good cause u can train it without stressing out the plant too much and affecting ur harvest.