Can what you ate cause a bad headache the next day, i went somewhere yesterday and had a hogey sandwich that had stuff like salami and cheese in it, ?

Definitely!: Since your history suggests you have multiple food allergies, and many hogeys have processed meats, preservatives, and nitrites, and other additives in it, you could have very well reacted to it. Also, if you had other fried side dishes too (trans fat), or alcohol too with it, if you were dehydrated, this could add to a headache by itself. Best to stay away from them.