It probably wasn't as loud as in a club, but it still could have damaged your ears? It may not be permanent if you have no hearing loss.
Lots of things in life we can't predict. I think if there's no hearing loss and only hissing, you'll be fine. But no one can tell you how long you have to wait.
It can change to ringing for a short amount of time if I'm around a loud place but it is still hissing