Every pound takes you closer to goal weight. It is very normal to have small loss's and bigger ones. If you add weight training, remember that your muscles retain water when doing new exercises and it can show as a temporary gain on the scale. It will also help you build muscle faster which in turn will eventually help you lose faster. Since muscle is more dense than fat, you may also build muscle (see the scale go up) while watching your clothes size go down. The scale is only one way to measure weight loss. You are doing great.