I shredded a cashier's check I had made payable to myself, did I just lose everything?

I went to my bank today, got a cashier's check made payable to myself to deposit into an account at another bank. I don't use checks, and thought it worked like a personal check. I decided not to switch banks, and shredded the cashier's check thinking the money would only be taken out once I deposited it. So I (incorrectly) assumed the money would remain where it was.

I do now realize how stupid this was, clearly I wasn't thinking. Did I just lose my savings? Extremely stressed to the point of nausea.