Get the bad stuff out of the house!
That's what I had to do. Good for you for throwing out the rest of the pizza! In my case, if I foolishly thought I could have a bag of Doritos in the house (as an example), those Doritos would sing to me all day and all evening... You know the song...
So, the bad stuff has got to go until the time comes when we get over wanting to eat it all. For some foods that day may never come!
Jay