The good news is the ringing will subside. But you have suffered permanent damage to your hearing. The ringing is evidence of that. The effects will probably not be noticeable long term but don't make it a habit. With repeat exposure the long term effects will be more pronounced. Your ability to hear will be affected.
I've been around shooting ranges all my life. From the time I was 8 till I was in my 20s I didn't even know ear muffs existed. Add to that I work in construction......
Needless to say I have some hearing loss......
Just this last spring I decided I had to do something, my wife doesn't have to shout at me but she usually has to raise her voice when talking to me.
I did some research on the net and found a product that has been around since the mid 80s. They are ear plugs that work like electronic muffs. There are no moving parts and they take no batteries. I had to have a pair.
Problem one was I couldn't find any in Canada, lots in the states, but I was unable to find a single retailer that would ship a pair to me for less than $80!
I contacted the manufacturer. I set up an account. Only issue, I had to order 100 pairs.
They work as advertised, I keep 2 pairs in my range bag, one in my pocket with my change, on in my tool bag and a set in every vehicles glove box.
You put them in. You can have a conversation with co-workers, or shooting buddies but still block all noise over 85 db. No need to remove them when at the range.
I currently have them for sale in the EE, I highly recommend them for anybody wishing to have a set of electronic muffs IMHO they work better than most electronic muffs priced under $200.
Stiff upper lip big guy. Learn from the incident, try to avoid it int he future.
Cheers!