Awww, sounds like you've just had a rough day! :(
Forgetting things is normal- especially your lunchbox! I used to forget mine ALL the time, and I still forget my lunchbox and leave it in my locker ALL the time :p Chances are it is right where you left it, or someone took it to the lost and found! And even if you can't find it, it's just a lunchbox- you can always use a paper bad or get a new one :)
AND RIP TO YOUR BRACELET But sounds like an easy fix if you still have most of the bracelet! All you need is a new clasp and something to help clamp it on the the chain, and there you go! You can find clasps and pliers at craft stores- they're very easy to come across!
I'm sorry your mom is mad at you, too. My mom is mad at me atm to rn HAHAHA. But just know that it'll pass, and before you know it, everything will be back to normal! :)
Anyways, I hoped this helped some bit! Just remember that tomorrow is a brand-new day, and you'll make the most of it! Lmk if you need anything else though!
Good luck!!