First thing you do is - Lock the account. The hacker will not be able to use it.
2nd - read this topic: Recovering hacked accounts or accounts with lost passwords
3rd - Confirm this is your main account: https://bitcointalk.org/index.php?action=profile;u=803144
If yes, then on the OP include the link so that the mod / admin do not need to look for it. Save some of their time.
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n^th step - after done with the 2nd step all you can do is wait patiently. (Assuming you will send one of the admin the signed message then  you will update the OP with your main URL link and signed BTC address)