There is a phenomenon in endurance sport called hitting the wall. It's the moment when the body has used every easy fuel source and has to dig deeper into reserves most people don't know they have. The athletes who trained specifically for that moment, who knew it was coming and ran toward it in practice, are the ones who break through it.
The ones who never practiced it stop cold.
Your life works the same way. Every hard thing you've already survived is a form of practiced resilience. Every wall you hit before and got through was a training run for the next wall. The subconscious files it. The body remembers it. When the next one arrives, you're not starting from zero.
The problem is most people don't connect the dots. They go through something hard, survive it, and then treat the next hard thing as if they have no evidence they can handle it. They forget to reference the library.
You have made it through 100% of your hardest days so far. That is not nothing. That is everything. Your subconscious has the data. Your job is to remind it.
Everything you've survived is still working for you. Let it.