Nothing bad will happen, man. Understand that the hepatoxicity of oral steroids is highly exaggerated.
I'm on a junk food diet as well and has been running:
300 mg of testosterone a week with 60 mg of dianabol a day for 4 months
300 mg of testosterone a week and 60 mg of winstrol a day for a 4 months
And now I will switch to 300 mg of testosterone a week and 60 mg of turinabol
And after that I will be on 300 mg of testosterone a week and 60 mg of anavar
I'm not taking any breaks and PCTs, I'm just switching from one cycle to another overnight.
Oral steroids' hepatoxicity is highly overstated. The only oral steroid you should probably be careful with, this is halotestin.