You went from eating healthy to eating like shit(standard diet in america) what did you expect would happen? your body is now burdened with all those extra chemicals it hasn't had to deal with for so long it's probably tripping out trying to get used to it. Not to mention you probably still have some candida an or parasitic infection cause last i heard you were still expelling candida. so add those toxins in as well. you're feeding everything again.
at least avoid the Sugar and bread man seriously. if i slip up, it's maybe some chicken or a salad at a restaurant. I'd never slip enough to eat a red meat burger.
Also when you come off a vegan diet you're supposed to start slowly. not add everything at once.