Yes, it was the Justinia/Isbeil quest I finished.

Well, I have to either reload all the way back to where I didn't destroy the barrel like a dummy, which is a long way back, or I just have to move on. I really don't mind starting over I already know what to do, the bosses will be a pain to fight all over again though. Thank you for trying to help me, I'll leave you with this... Have a nice and lovey day!