Stay calm. It can "go away" sometimes if you stop thinking about it. I don't know how serious or "loud" you perceive it to be but you'll be fine, you can listen to music but you have to take extra good care of the hearing you have. Don't listen to music too loudly, I would even suggest set your volume even softer than usual for the next week so you can train yourself to focus on it. Ear plugs at concerts and safety earwear if you are around construction sites or places that produce a lot of loud sounds.

I would get it checked out with a physician if you suspect that some kind of ear infection, stress, new meds or other kind of illness or complication might be the cause.

There was a trick to temporarily relieve it where you cup your palms over your ears and tap the back of your head, can work for some people to relieve it a bit. Doing that might help with the stress you're facing. The stress from worrying about it I think will do you a lot more harm long term than any of the buzzing or ringing itself.