You ate a McFlurry. That is very human. You dont do it every day, but this time your sneaky brain got you to do it. Absolutely normal. Happens to everyone. Theres 2 narratives you have to choose between. Either that the McFlurry means the world. It symbolises everything wrong with you. You are now a complete nogood screwup. This narrative is based on some false logic. All the good you have done suddenly means nothing. Didn't matter at all. Is that really true? All this narrative is good for, is giving you the old easy path into more bad choices. Might as well eat more mcflurries because you ate one. Think about that. Imagine talking to a friend in your situation. Wouldn't it seem absolutely crazy if he or she started giving up everythimg achieved bwcause of 1 mcflurry. The other narrative might be new to you. But its the one happy succesful people have. Everyone screws up sometimes. Dont expect yourself to be 100 perfect when almost noone is. All the succes you have had is worth so much. It's ok to be annoyed for eating wrong, but it's very bizarre to use that as a reason to fuck up further. Everyone fucks up. And youre gonna do it again some day. You are still the exact same person as before you ate the mcflurry. Will you let the mcflurry change you?
And the job, that sucks. It doesnt feel good to be let go. But the same thing applies. It happens to good people. 2 narratives. Easy path into bad choices and negativity. Or, it sucks, and that is OK. Bad stuff happens. It is part of life. At least you get a chance to get some change which might be for the better.

Dealing with negative events in a construtive manner can be hard. But itd essential to accept that is happens. Its ok to feel bad, or screw up. Its not ok to use it as an excuse to lead yourself to more negativity. Its easy, if thats what youre used to doing. Choosing the right narrative will get easier and easier, until it feels completely natural.
On phone, hope it wasnt too much of a rant or too many typos. :)