A Short On Discipline

Am I getting fat? I think so. I'm taking Summer classes and I get so bored that all I do is go on the internet and eat. I know that there's nothing wrong with being fat but the fact that I'm losing my self control is what's bothering me. Like I would eat my food and instead of putting the remainders in the fridge, I'll put it by my bed and wait a few minutes to eat the rest. I kid you not, a couple days ago I bought a parmesan bread bowl from dominoes, ate like half the bread bowl, realized I was full, and still ate the rest. Like my stomach was hurting and I still ate the rest. What is happening to me? By force-discipling myself and taking Summer classes am I actually un-discipling myself? All I know is that I need to tighten my grip on my rules. Or exercise more. I'll probably do both.