Anthony gives some good advice tp your stoty. But 1 re assuring, startimg to eat healthy is never bad for you. Even when ur not used to it. One of my major helps is. When you dont want to eat it, dont buy it! And make sure you have a healthier replacement. As with eating at work and when not at home. I always felt like i was wasting my time at home if i were doing whatever at work or away. Also bringing own food with you works wonders.
Sure you get strange faces every now and then. But think on the long run, you will get alot better faces when they see results!