Hey, don't worry about it, you are not alone in overreacting to "stupid" things like this. I can't count the number of times I have been in this situation myself. At first it freaked people out, but now they are more like "jeez, what is it THIS time" whenever I start uncontrollably sobbing and hyperventilating over random every day stuff.
Mental illness does that to you. You just have so much going on that a tiny little extra thing is all it takes for everything to fall apart. And then you start to feel stupid cause it is kinda silly if you look at it from a regular persons view. But again, due to mental illness, there is a limit to how much some of us can cope with. Don't feel bad about the ice creams or your reaction to what happened (easier said than done, i know). Enjoy the fruit and anime and let it transport you to an easier and better world for today.