There are a lot of sources that talk about a "3 week stall" that describes a temporary (maybe 1-4 weeks) halt in weight loss right around this time-- don't worry, it's normal! I've read that it's the body reacting and adjusting to the change (and making sure it's not starving). Some people say they have a big drop right after the stall ends and that they have other signs of 'progress' during this time. It might be a good decision to weigh yourself less frequently, like once a week or so, so that you don't agonize too much over the micro-ups/downs. I personally hit this stall for about a week, quickly lost another 7 lbs and then hovered there for another couple of weeks. Keep doing what you are doing, you are totally on the right track!