It's because you're working out like a demon, chickie!!! I hate exercising because it makes me just binge and binge afterwards, every time I can't help it - I burn calories, get hungry, stuff my guts, have to go work out again
You can eat as much as you like, providing it's good, balanced and high in nutrients. Try to avoid 'low-fat', 'no-fat' and 'lite' or 'diet' products, (what they lack in fat, they make up for in added sugar and artificial things that have no nutritional value) just eat the full-fat/regular versions but watch your portion sizes. I found that to be very helpful when losing weight as your body burns natural fats much more efficiently than it burns sugars, and they will make you feel fuller for longer, whereas the 'diet' products always leave you wanting more.
I am a huge fan of eggs when losing weight - I have a boiled egg on wholegrain toast for breakfast and find I don't want to eat until lunch, whereas if I eat cereal or fruit salad or something else for brekky, I'm starving again by 9:30 even if I'm sitting on my bum, kwim??

You're doing a fantastic job getting back into shape hun, I'm so proud of you Keep up the great work!! Best of luck with your weight-loss goals honey, take it easy on yourself and enjoy watching it all fall off slowly, you'll get there! x