I'm pretty sure I just lost my save file. I only had it to local save and my computer restarted. Now it's just completely gone. Could it be anywhere else?
Are you playing on the browser version? Then yes, if a reset also flushed your internet cache your save is probably gone for good; make an occasional save to file (which you can transfer between every version of the game) for safe-keeping in the future. If you're playing the download version a computer restart shouldn't have done anything to your local saves.