Struggling with Safe Foods and Sensory Issues

i have a lot of problems with eating due to my sensory issues but usually i have a couple foods that are my safe foods and i know i can always have but my usual safe food that's an actual meal isn't a safe food anymore and hasn't been for the past week but it's the only one o have access to with my budget and transportation abilities and so i keep eating nothing but salty chips and chocolate milk or gatorade and I'm starting to worry, usually if it stops being a safe food it's for like a day but i haven't been able to have it or anything else of real value for a few days now and i don't know what to do to fix it. i also can't have most of the safe foods i used to rely on due to my gluten issues so that adds to the issue