I had that ringing once, it will go away by tomorrow. It helps to have a g-friend in a band who nags you every time you go to a show. Plus, i now have a pair of earplugs virtually everywhere, my car, every satchel or bag i might have with me, at griflfriends house. Makes it easier and also serves as a reminder.
And it was very loud last night. Anyone who doesn't wear earplugs is stupid honestly. I'll have no sympathy for you when you're 55 and can't hear shit. And it will happen.