Re-jailbreak my iPad? PLZ HELP

I

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Hi,
today I finally managed to jailbreak my iPad 2 (8.4) with TaiG 2.3.0. But then I accidentally updated my device via iTunes when it offered me to update it to 8.4 (weird,I already had it). Since this Cydia dissapeared :((( So I tried to jailbreak it again. But now TaiG freezes at 20% or 60%, then it tells the jailbreak process failed. :(

And - when I turn on Taig now, it shows information about my iPad as "jailbroken".

Please help me what to do. Thx