just surviving the week

hi all, i leave for college this weekend, woohoo!
yesterday, me and nmom get into a fight over a tin of sardines. You heard that right, a sardine tin. I like to eat them and my dad bought me some for lunch. Keep in mind I just got back from a trip with my friends that day and had been home all of 20 minutes. Mom goes “i hope you don’t eat those in your dorm” and i politely tell her “that would be a conversation for me and my roommate, I agree” mom flies off the handle goes “fuck it.” and storms out the room.

I told her i understood where she was coming from. She’s still screaming. I’m getting frustrated and confused, dad has started to take her side which was unusual but fine.
me and mom had a huge blowup the week before where her friend had to come over to calm everyone down. She asked the question “name one good thing about your mother” and i could only state she was a hard worker. She does a lot for me and I know it, but I didn’t consider the things she does as traits and also believe that when she does do something for me there’s always a catch. She took that as in I don’t think there’s anything good about her and she doesn’t mean anything to me (as they do) so now i predict this entire week will be filled with arguments about that. Any advice? grey rock, yellow rock, saying okay to everything doesn’t work. she has no desire to fix this and i really think if i breathe the wrong way around her she’ll flip