Ditto to what Bargoo said.
Also, have you tried calorie cycling and doing a new exercise? It doesn't even have to be "harder" than what you're doing, just different.
If you're not a calorie counter then I dunno, the exercise thing could still help. If you don't exercise maybe it's time to start? My goal is to get to 199 and then start an exercise plan and figure out a new calorie intake since I know it'll slow down after that amount of time an weight loss.
You know your body so listen to it's signals. Also, you've done really awesome! Don't forget that.