It’s possible that your tinnitus has developed as a result of your use of multiple rounds of antibiotics. Please see:
http://www.everydayhealth.com/health-questions/tinnitus
If this is the case, the tinnitus may (or may not) go away or get quieter after the infection is conquered and you are off antibiotics.
Logically, an infection that was only in the outer ear would not likely lead to tinnitus because the nerves that are used for hearing and are believed to be damaged in many patients with tinnitus are not in the outer ear. They’re deeper, past the tympanic membrane.
But if your infection spread deeper than the outer ear, which certainly can happen with an unresolved infection like this, then yes, the infection could be the cause or an additional cause of the tinnitus.
I wish you well including relief from both the infection and the tinnitus.