Hi Tara,
Don't give up! You're on the right track including strength training in your workouts. Without having all the info needed to calculate your base metabolic rate (BMR) and total daily energy expenditure (TDEE), it's hard to say exactly what's going on in your case, but if I had to guess, your calorie deficit may be a touch agressive. How did you decide on 1300-1400 cals/day? Are those numbers tailored to your needs (do they account for height, weight, age, and activity level)? With how active you are, maybe 1500-1600 cals/day would be more appropriate for you. I'm not sure what your current eating habits are, but make sure you're getting most of your carbs from starchy and fibrous veggies, rather than breads etc.. You should also be sure you're getting enough protein and healthy fats. A body that isn't getting enough fuel or the right kind of nutrients is going to want to hang on to its excess weight. Again, I don't know what your habits are like, but drink enough water and skip sodas, juices, and coffees that are loaded with sugar.
Hope this helps, keep up the good work!