Originally Posted by v-verb
You're probably losing fat and gaining muscle. Don't worry. Eat right, train hard and get plenty of sleep.
You'll see a difference in a few weeks/months
Hopefully, but I doubt anyone could gain muscle on only 1200 calories a day.
1200 is way too low you need 1500 minimum for a person of your size if you are working out vigorously everyday. Your diet should consist of a moderate calorie deficit and be high in protein. About 35-40% of your calories should be protein so that makes 130-140 grams of protein per day which will be difficult to get unless you supplement.