Advice Please! Timer Failed

Hello i have been veging for about a 7 days now and i noticed my 400w was on earlier than expected. I have been growing from seedling so i was 14hrs light on, then started veg 7 days ago with 400w mh. So it looks like for last 7days i have been running 24hrs aday light. Question if i drop down to 18hrs, it wont go into flowering from 24hrs of light? Also have i just made these males? thanks for reading any advice would help, scared i screwed it all messed up and forced them into males.

A change in lighting never means that there will be a definitive outcome, especially in early vegetative growth. If you wanted to play it safe you could stick with 24/7 until you are ready to flower.