Is there a word for this emotion?

You are about to quit your job in which you have been dreading going to for months!
Right when you are about to go and tell your manager… You realize how much you will miss it, and how it was overall not too bad. That happened to a friend of mine and she told me and I wasn't sure exactly how to describe it either.
When it happened to me it was like this:
I was finally going to get an iphone, which I wanted for a long time, but then I realized how much I like my LG env orange, so I kept it. But then it broke 1 week later.
So have you ever felt this way? Does this emotion have a name?

Regret

Unpleased.

to be… Enough to throw up an easy life.

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