You probably gained muscle, because it seems with all the hard work you're putting into losing weight you'd lose a little more. One muscle cell weighs about twice as much as one fat cell. Muscle cells are also about twice as compacted. Fat cells are more spread out. For this reason it is why many athletes may seem a bit overweight, but the real question is, are they "overfat", so to say? Heavyweight athletes sometimes have the lowest fat percentages on their bodies even though they weigh so much. So yes, you probably did gain muscle. If you want to check your fat percentage, type in "fat percentage calculator" in a search engine or there are tests where they send a slight (but not harmful) electric currnet through your body. The internet way is easier, but the electrical one is more accurate. You might be able to find one of these electric machines at a gym or fitness center; I'm not exactly sure WHERE they are as I've never seen one. I'm not saying you must get your fat percentage checked but it's only if you want to. Nothing extremely important. I, personally, wouldn't recommend just finding a gym or whatever with one, I would just find it on the internet or not find it at all. And keep up the good work! It seems like you're already doing a very good job towards losing weight. Good luck! ^_^