It's the supplements and the workout's hunger blunting effect from all the adrenal hormones(fight or flight response) Your hunger should come back a few hours later but i'm sure the pre-workout and energy pill are further blunting your hunger since they enhance adrenal activity. Times like these you have to make a choice, cut out the pre-workout( i probably wouldnt) or just eat regardless of hunger. We have to eat for nutrition, not for pleasure, if you wan't to reach your goals sometimes.