Help!!

So I misdelivered a package the day before yesterday that required a signature. I have a slight memory of delivering it but I was moving really fast. I got a call from my supervisor yesterday that the package had been misdelivered and the signature just looked like to dots or slashes. I went to recover package from the house I delivered it to where I ran into an elderly lady who barely spoke English but is adamant she didn’t receive said package. I’m worried now that if the package doesn’t turn up I may be the one who suffers. Anybody experience anything like this before? (I’m sure I delivered package and asked for signature but I don’t remember checking the signature once I did)