Aliisa - do not give up. Be careful with pushing the workouts! Too many times someone will go gung-ho and over-exercise causing more muscle to build than you want. Muscle weighs more than fat - and is harder to lose. Walking (not power walking) will do wonders for you.
Also - make sure you stay hydrated at all times - increase your water intake - and drink before, during and after your walk/workouts.
check out our sister site - join the bunch of losers there!
The Weight Loss Twins - Bill & Jim Germanakos
There is so much there - including support and help.