Rough weight week

I don't know why, but I have had a rough week. Last week I lost 4 pounds, and now this week I did not keep on track. For a full year I was on top of this and lost 50 pounds. Now I had gained back 15 pounds. I want to lose weight before I go on vacation. I will do good for a few days, and then I am sticking all kinds of food in my mouth. I have to get this under control. Now next week I have to get off this weeks weight. I get so irritated after I do something like that and then have to make up for it. But, why then don't I stop myself. UUGGHH!