Ive been working out for 3 weeks now and i havent seen any improvement what am i doing wrong.

i do this everyday.

100 pushups
700 differents situps (crunches,bicicle,side crunches)
6 min of rotating a 10 pound medicine ball side to side.
6 min moving side to side (like touching the outside of my knee)
4 rounds on heavybag (2rounds of combinations, and 2 rounds of only one hand)
3mile run

ive started keeping a 1000 calorie per day diet. I havent eaten any junk food that much and ive been drinking a lot of water.