If you've only recently started exercising, your weight losses will slow down. As you start to exercise, you get a fluid build up in your muscles and it 'adds' weight. This isn't a bad thing, and you will start losing the weight again, but just don't let yourself fall off the wagon because your losses have slowed down
I'm dying to get back to the gym, but I know if I go back too soon, my losses will slow down and I'll end up throwing everything out of the window (eating things I shouldn't lol) purely because my losses will slow down a lot or stop completely.
Keep at it hun!