Not to be pedantic, but it's not shift+; it's :, which may be somewhere else depending on your keyboard. For example on (german?) Quertz that's shift+.

I know exactly what you mean. Let me tell you why you're here. You're here because you know something. What you know you can't explain, but you feel it. You've felt it your entire life, that there's something wrong with the world. You don't know what it is, but it's there, like a splinter in your mind, driving you mad. It is this feeling that has brought you to me. Do you know what I'm talking about?

Exactly. What OP should do is never close vim. You don’t need to close it.

A surprised emoticon with a cigar hanging out of its mouth isn't particularly helpful.

You just discarded all of your changes.

What if I am not sleepy?

Same here in the beginning I used

Ctrl-z

kill %1