Yep - that's why we say diet is very important. You'll probably notice increased hunger. When the body is telling you to feed, it....you should probably feed it!! Know the difference between hunger and cravings and you'll not have that tendency to get fat - rather fuel the truck when it's running low on diesel.
If you'd like, post up a sample of your diet and the dosing you're taking and we'll be glad to take a look at it.
Also, and this really should go unsaid, but... GET SOME SLEEP!!! Your body NEEDS it to recover from the day, recharge your brain, and rebuild what you tore down in the gym. Sleep is crucial! If you can squeeze one in, take a power nap in the early afternoon. It used to work wonders when I could do it!!!