How much will i gain for eating a whole pack of twix and half a bag of doritos?

today for breakfast i had plain yogurt, for lunch a salad and for dinner you know what i had????!!!??? A pack of twix that brings two twix, candy peanuts and half a small bag of doritos(the 75 cents bag)!!! Omg how much will i gain for eating all this junk..i mean i was craving junk but i over did it!!! how much will i gain and should i drink a laxative? I have a history of bulimia but i dont want to purge cuz i dont want to go back to bad habbits!!! idkk idk idk