I have no idea what to do. :-/

Well after taking a break from league for about a month, I logged back on to the game, and immediately a notification popped up telling me to update my launcher. I sis as the message instructed, following the message to an official download. After downloading the "Update" i logged back in to the client and was met with the normal "Insert username and password" which I did for my account. However to my surprise after logging in it said choose a summoner name. After entering a name (Different from my previous acct) it led me through the opening, with summoner icon selection and what not. I you search my account in game, (Vaeiful OBVIOUSLY) it will show you my real lvl 29 account with Aurelion sol as highest mastery, Veigar 2nd, and Kayle 3rd. Any help? I spent a lot of time on that account. Thanks :-/

-As Always Vaeiful