You've been sticking to your workout routine for two to three months and watching what you eat, yet the scale seems to be stuck.
The problem could be that you're doing the same exercise routine over and over, and your muscles have memory cells. "Your muscles become more efficient at whatever it is you're doing consistently," It's no longer a struggle, so you plateau.
To increase your calorie burn and get the full exercise benefits, kick your workout routine up a notch. If you walk, try jogging. If you bike, head for the hills. If your weight training change the exercises or try some new aerobic exercise.