I think that I have lost my usb stick

Well, actually, I am pretty sure I have. Nothing to crucial on it, but it could be used to log in to my evernote and email, so have busied myself changing all the passwords on those. It had my MSc and teaching portfolio as well, but they were all anonymised, boring and backed up. It is a shame as it was 16Gb, a very handy size for keeping a backup of images on holiday. It also had all my favoured photo portable apps and a persistent install of Linux Mint. I have recreated the MSc and teaching portfolio data on a encrypted usb, but the biggest usb I have now is just 2Gb, enough for half a day of photos!