Forgot to send allergy meds and I'm spiraling

I packed the kids' overnight bags this morning and completely blanked on putting my daughter's epi pen in her backpack. Realized it 20 mins after drop off.

Texted my ex immediately, she grabbed it from my place (thank god we live close). Daughter is fine, never had an incident.

But I literally cannot stop thinking about what could've happened. I'm usually so careful about this stuff. One forgetful morning and I could've caused something serious.

How do you guys not spiral about this stuff? How do you trust yourself after something like this?