Food/vitamin recommendations for withdrawal

About a month ago I went to the ER in hopes of being able to detox there, no luck and was sent home with a 6 day benzo prescription, well the new year is FINALLY here and I was able to schedule PTO for this upcoming week so I can travel to my parents and withdrawal there. My parents have kept the benzo prescription for when I come, and I also have vitamin b1 I plan to take everyday. Should I also bring a multivitamin? I was planning to make a stop to the store to get sweets, Gatorade, water, and soup but I’m not sure what else to bring. Any advice is appreciated