Weight loss diet - yesterday was not as good as I expected

Well yesterday I had started eating as I had planned to: a grapefruit for breakfast, light sandwich for lunch...but then I got home, and it was really cold ...you know how it feels, cold brings hunger pangs and you start yearning for a hot plate... and my mother greeted me with a big plate of pasta and then another plate full of turkey left-overs from new year's day dinner. I tried not to eat but I couldn't :( On the brighter side, I did do all the exercise I had planned to: I walked for 30 minutes, did push ups, weights, press ups and used that bike thing for 10 minutes. I ache all over today so I guess exercise is really working on my lately-totally-unused muscles. I will increase the amount of exercise as time goes by but I don't want to push it right now. I still need to get used to living a healthier life-style and so far it hasn't been that difficult...now I need to learn how to say no to food...
For those people who never saw a food pyramid I uploaded a diagram for you. It basically tells you which foods you need to eat least and which you can eat the most of. Example in the diagram on the left, the narrow end of the pyramid contains fatty foods (bacon, sweets, etc...) You must not eat a lot from this food group, however you should include a lot of the foods mentioned in the wider end of the pyramid(basically includes carbohydrates and starches). Referring to this pyramid helps you maintain a balanced diet.
So considering this diagram, I did keep a balanced diet: the grapefruit was a good source of Vitamin C as well as having a lot of fibre. Fibre was present in the brown bread I ate for lunch. The brown bread and the pasta were the main source of carbohydrates for the day. Turkey is high in protein which helps to increase the muscle-mass when you include training (which I did). Keep in mind that complex carbohydrates (such as the ones found at the bottom of the food pyramid) are the first to be burned up when you do exercise or you feel cold, if you don't do exercise and you eat a lot of carbohydrates, these will be stored in the body as fat; so when eating a lot of carbohydrates, you need to do a lot of exercise.
That's it for today. Tomorrow I will tell you what I ate today and keep you updated with anything I did. See ya.