Lost it all

I still cant belive what happend honestly. Im still in shock.

I had 3.533382 BTC that i moved into my Coldcard because everyone always says hardware wallets are the safest. I thought i was doing everything right and taking security serious.

Then one day i checked my wallet and it was just gone. All 3.533382 BTC gone. I kept refreshing thinking maybe it was some bug or something but nope. The transaction was already confirmed and there was nothing i could do.

I honestly dont even know what went wrong. Ive been replaying everything i did over and over in my head trying to figure it out. I barely slept since it happend. That wasnt just money to me, it was years of saving little by little.

Im not posting this for pity, just because i honestly feel sick and i dont want anyone else going through this if they can avoid it. If anyone has any idea what could of happend im open to hearing it because right now im completely lost.