I can eat carbs with no issue.” Bad” carbs it depends on quantity , when they are eaten and the day of the week. If I want cake I try to choose one that has whole meal or almond flour and nuts or fruit rather than a big sugary confection. I have had a small ice cream ( whilst on holiday) with no issue but I was extremely nervous when I ate it. Small quantities of chocolate don’t seem to affect me but then there are days where I have a small quantity of something or eat a healthy food like oats and the body decides no. The result is palpitations, shakes, a funny taste in my mouth and generally feeling yuck.
As for alcohol I am now a very cheap drunk. Had 1 glass of sparkling wine last night and had to go to bed as it went straight to my head.
Being too scared to try these kind of foods is probably a good approach.