I also developed Tinnitus after the J&J shot. Both ears. The ringing was on and off for the first few weeks after the vaccine shot but at about 4-5 weeks was a full fledged in both ears. Was so loud at first I couldn't focus on anything because of the anxiety. I'm either used to it now or it's quieted down enough that I can at least get through my day. An ENT didn't help me out besides prescribing something that's typically used for insomniacs so that I can sleep at night.