I just ate a medium Big Mac Meal and half a McFeast. Am I going to get fat?

I do weight training 5-6 times a week. I usually eat a lot. I'm not sure how many calories, because I don't count them. I just eat when I'm hungry, which is often. I'm pretty thin and muscular despite me eating chocolate daily and frequently ating HALF a Big Mac with my boyfriend. I think it's the weight lifting.
Anyway, I'm always comfortable with eating until I nearly bust if it's something more nutritious. A lot of chicken breast and hot potato chips hasn't made me fat before. BUT I freak out if I eat a lot of something that's fast food. I also woke up this morning craving fried rice, so I ate chinese food, too.
So today, I ate two pieces of peanut butter toast, some chiese food, the McDonald's and a handful of Maltesers.
If I go do some intense cardio tomorrow, will it prevent me from getting cellulite and fat?
I just ate a medium Big Mac Meal and half a McFeast. Am I going to get fat?
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