One day you will be dead. One day everyone you know and all memory of you will not exist. At some point in the future the last of your descendants will die, the last human will die. Some centuries after that the last living microbe on Earth will be wiped out, and the black Earth will be destroyed by the exploding sun. One day there will be no intelligent life left in the universe at all, no mind or soul to contemplate the cold, drifting atoms, and after more aeons, the universe itself will be no more. That's how unimportant your worries are.