Dumbbells

Finally, I have bought dumbbells... And it's awesome..Mine is the pink one..2lbs something each... Since I'm drinking Herbal Life, I can see major changes from my body weight, my appearance ( looks and all).. I feel great.. 
But there is a problem.. I went for a body scanning.. Everything is perfect but my fat percentage increase 0.2% and my muscles decrease 0.4%..where it's linked that when your muscle goes down, your weight will go down as well.. So I guess you guys know what I mean..lolz! 
The instructor requested me to exercise.. as everyone knows, I have no TIME!! 
I'm working and also studying..
By the time I reach home, it will be around 11.00pm.. so no time at all..
My dear friend Sakthi recommended to buy this dumbbells as this worked for her to increase her muscles just within couple of days.. So, I bought this to do few sets of exercise before I take my shower at night..
My next scan will be on this coming Friday.. 
Feeling so damn scared..Phheeww.. Must drop of the fat percentage and increase my muscles.. 
I hope I can make it..;)