I was suddenly exposed to a very loud noise and my ears won't stop ringing. What can I do?

See an ENT ASAP. Just saw this posting... See an ENT asap if you are still hearing the noise with decreased hearing. This needs to be treated asap... You may have a sudden hearing loss from the noise trauma.
See ear doctor. Hearing. Loss due loud noise can be temporary or permanent. Ringing is often due to hearing loss. You should see specialist to get hearing tested.