Can't seem to lose 20 pounds

Hey guys i just started college last semester and lemme just say the freshman 15 is real if your really don't watch yourself lol. I gained around 20 pounds and I just can't seem to lose them. Before college I played on the varsity soccer team in highschool and did martial arts like muy Thai and tang soo do every day for like 2 hours. I use to weigh 110 and now I weigh 130. Sure I admit when I first came I ate so much and I see why I gained weight, late night mcdonalds with friends at 5am and eating food like Korean chicken with white rice. The last month I've been eating healthy though and haven't lost a single pound infact I gained weight which seems impossible. My problem isn't that I'm eating bad anymore but now that I'm in college I just eat more than I use to at home because it's made for me. At home I barely ate anything because my parents never made me food id always just eat a frozen meal late at night when I came home from sports. Now I eat more but I am eating healthier. I stopped eating any fast food and I don't drink anything but water. I use to be able to wear size 00 or a 24 pants size and now I can't even get them over my hips. I gained all my weight in my lower half and barely any in my stomach. I really wanna lose weight but it's so hard not having the best food choices since I don't have a kitchen in my dorm room. Like when I went home just for Christmas break I easily dropped 6 pounds by making healthy food like egg whites with spinach every morning for breakfast. Another thing is I'm college no more sports everyday for me I can only occasionally go to the gym which isn't nearly what I used to do. I'm only 5"2 and i really am trying to get my body back any ideas on how to lose this thigh fat and a little stomach fat as fast as is reasonably possible. I know I'm not going to magically drop it in a week. Oh and I'm 18 btw and I set my goal to net 1200 calories a day because my bmr is 1400 but I usually go over sadly but never over 1800. Any tips on how I can lose this leg flab I don't have time to exercise a lot which is depressing and I don't have the best food choices what do I do I'm desperate