I need to lose weight

I need to lose some belly flab before my cousin's wedding.  They are getting married this Christmas and I want to look fab in my dress.  I am dieting and working out but they don't work.  I haven't lost a pound since I started my weight loss program.  I have also tried a lot of different exercises; running up and down the stairs for 5 minutes (total of 30 minutes daily) and indoor walking but my weight remained the same.  I already nixed my afternoon snacks and eliminated rice at dinner, but that just made me cranky.  I have a friend who easily lost 15 pounds after taking weight loss diet pills.  According to her, it helped curbed her cravings and increased her metabolism.

I'm not totally going to depend on the weight loss pills though; I just want to jump start weight loss.  It's been more than a year now and my weight hasn't budged.  My thyroid became very inactive ever since I quit smoking.  I think my friend's secret 'power pills' will work for me too.  I won't be giving up working out because I really need to lose a lot of weight.  I am starting to get frustrated although I kept telling myself that even if I don't lose, I am doing my body a favor.