How to you come to terms with the fact that you will eventually not exist?

Rant: This has been keeping me up at night for way too long and every time I think about it I feel like am literally choking on my own thoughts. I have other shit to do but everything seems so inconsequential next to this. I just can't comprehend why or how the universe even exists or how a bunch of atoms can think or that quantum mechanics literally revealed that the world is not loaded when you are not looking like how tf do you know that I am observing something.

Btw I am not looking for a purpose in life although this may be interpreted as me asking for that.

If anyone has the same problem as me good luck my friend just know that you are not alone.