I left to go check on something, and my computer deleted all my conversations, so I don't know who replied or asked me something, is there anything I can do?
I am not sure how your computer could possibly delete all of your conversations. o__o (It would have to click multiple options! >>)
But I am afraid if they are deleted, you can't get them back unless the deleted convo was deleted with the "allow replies" and the member you were talking to replies to the convo again.