Help!? PLZ :)

Getting_There78

Hello, I'm a 22 year old female I workout 3-5 days a week and burn 300-600 calories at the moment (that I know of according to the machines) I do not have a job so I do sit around a lot at the moment. I workout for at least 1 hour a day maybe 2 and right now I'm eating 1200-1500 calories a day. Only thing I do really is walk at a high pace on the treadmill. I weigh 210 pounds at the moment and the reason why I'm telling you guys this is cause I need advice. Am I eating to little? Am I not working out enough? I eat 3 meals a day about 400 calories and snack to usually put my calories up higher. Suggestions?

I'm 5'6 btw!