First things first - If you look at your profile, it says "Unregistered" next to your name

> yael Unregistered

on both your old and new accounts.  So the first order of business is to register your account.  Push the "login" button on the top of the screen.  You can either use an existing identity provider (Google, Facebook, OpenID) or if you prefer you can create a StackExchange identity that is independent from all of those.  That will prevent your account from disappearing in the future when you clear your browser cookies or similar mishaps occur.

After registering, you can follow the general procedure for account merges - http://meta.stackoverflow.com/questions/18232/how-can-one-link-merge-combine-associate-two-accounts-users-anonymous-unregist.