Trying to prevent a meltdown by buying cheese and Mom's mad at that?

So I'm get grumpy if my family gets low on something like cheese. I'm was on my last brick of "my cheese" and I had none in the basement.  Yes it would last maybe for a week-but when most of my lunches or suppers require cheese:

Lunch:

Mircowave cheese sandwhiches

mircowave chilli

Bagel with cheese

either microwave or stove omelet 

Crackers and Cheese 

Supper:

homemade Mac and Cheese

stove-top  omlette 

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I have meltdowns or get really upset if stuff like Orange juice isn't ready for when I want it.  Because I need to have OJ at a spefic time either for lunch or for breakfast depending on the day.   I'm afraid once I ran out of my cheese and had none in the fridge in the basement I would have a meltdown because I can't think of much to eat that doesn't require cheese in some shape or form- except for Ramyeon and soup and I need to save the ramyeon for every other Thursday when mom's at choir during the winter time and I only have 2 of my "weird soups" left I'm not sure if the 3rd one is one of my "werid soups" or not (potato and bacon soup but its 90% is).  

So to avoid a potential meltdown in the future I went to get some bricks of cheese -Armstrong cheese:

1 block of Monterary Check 

1 block of Mexcian festival

(both my cheeses)

1 Marbel chesee

1. Old cheese 

(Mom  cheese which I use for Pizza)

1. cream cheese (Herb and Garlic)-I was runing out of this 

3 containers of dip- one tzakzi dip, one 5 cheese dip and 1 spinach dip (I found out afterwards I didn't need the spinach dip)

1 jar of  cheez whiz-also running out of this and I had no back up

and 4 jars of OJ ($2.47)

the only thing that was NOT on my mental list was 2 bags of Armstrong Shredded cheese but when it was on sale for $2.47 that's cheap).

The cost of everything was $82.60 (since i'm in Canada round it up to $83.00)

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So when I got home my parents had just gotten home as well and Mom's was like "I hope you didn't buy 10 blocks of cheese".  I mean I have my own money and I was being proactive in preventing myself from having a meltdown in the future of either no cheese or no OJ (the only cans remaining until I brought 4 today- were from 2013 and they're ancient and would be very "off" after one time we had no avaible juice)

So why in the world is my Mom mad at me for me trying to prevent a meltdown of "no cheese" by going to buy expensive cheese (the actuall price is $11.69  so its $12.00)  i could have gotten 2 of MOm's cheese for cheaper but I didn't know about the sale until after I got to that area on my way to the OJ section