@kittyrushing: I have experienced this type of tinnitus, exactly matching my heartbeat. I suffer from severe anxiety and depression, and take medication for these conditions. I tried all kinds of medication and got many tests done, but the sound continued. Then, about a year ago, I took pregabalin to control my anxiety. What happened was very unexpected. In addition to a reduction in my anxiety, the sound in my ears also stopped. And has remained stopped. I don't know if this would help you. All the best.