Exercise after eating fattening food... will it make a difference?

I spent this morning eating chocolate and pizza out of depression…. I feel rather guilty of it since I have been trying to lose 10 pounds and get fit, and I have been trying to eat healthy and exercising a lot. I feel like I just spoiled all my hard work! I plan to work out today, some jogging and some weight lifting, like I always do. I was wondering if this would make a difference. Would it burn the chocolate and pizza I just had, or is it too late?

Sorry if I seem rather ignorant about this stuff, I’m not too knowledgeable on diet and nutrition. I’m not overweight either. I’m 5’4” and I weigh 130, but I prefer to weigh 120. Have a few excess fat on my thighs and tummy, and I’d like to gain muscle.