[ Psychology ] Open Question : So, I got a new job and..?

This is my second job ever, and I have been working there for about three days, and am still getting used to the touch screen systems (burger king), and the items on the menu. Unfortunately, one of the managers said they were disappointed in how I was working, despite me trying my best to learn. (I worked non-stop for all of my hours, and tried the best I could, without slacking once.) I was actually impressed with how fast I caught onto a few things within those three days, so all of that was just a kick to the chest. I felt terrible all day, and felt extremely stressed. What should I do? I also have severe anxiety, and after all of this, I feel as if I'm disliked. It completely ruinef the atmosphere for me, and I almost cried three times within thirty minutes. :/ I slipped up a few times when it came to the menu, so I think that's why my manager was upset.,

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