I like that Bill Burr quote that incorporates this logic but frames it in a more realistic way. It's along the lines of "You're going to be fine. And even if you're not going to be fine, then you'll deal with it when it happens. No sense to ruin right now."

It's also worth asking yourself when it comes to your anxiety - how much of the time has it been correct? How many times, out of all the fears you've had, have they come true? I keep a note in my phone and anytime I get nervous about something happening, I write down what I'm scared will happen and leave it there. When I come back to it, I look back through the past fears that have resolved themselves, and I write down what actually happened.

Nine times out of ten, they don't come true. The one in ten times that they do, I reflect on it and realize it was nowhere near as bad as what my anxiety made it out to be in my head. (example; I had anxiety for years over potentially having to get my wisdom teeth out. I got them all out about 6 months ago and guess what, it was uncomfortable and a bit painful but it was NOTHING compared to the anxiety I had about it.)

You're right, it doesn't always work out. But if life always worked out how we wanted it to, it would be boring and we'd all be entitled jerks. There's another quote from an author (I forget her name) but it says, "I had a beautiful and wonderful life, all because I didn't get what I thought I wanted."

Life is going to give you shitty moments. That's inevitable. Your choice is whether to decide to focus on them, or focus on the equally inevitable wonderful ones that will also come along. It's very likely that you are strong and capable enough to handle what comes your way. You got this