you could have gotten tinnitus from medication. some medications (quite a few of the stronger antibiotics) are known as being ototoxic. my tinnitus started while taking antibiotics for a bad infection. I cant prove it was my antibiotic, but the antibiotic was ototoxic
I think this is the cause of mine. An audiologist said my actual hearing is remarkable and recommended protecting it, so I don't think it's hearing loss.