I'm going to a homecoming dance on October 18 and i really want to lose fat. If i do this how much fat could i lose?

I'm 16, female, weigh 133, 5'7 and a half tall:

35 min brisk walking everyday, last five minutes jog
small portions, mostly fruits, veggies and protein
8 cups of water per day
weightlifting/working out 45 min EVERY OTHER DAY
15 min biking everyday

17 min jogging in place almost everyday

how much fat could i lose by October 18?