You may have to take another look at dealing with depression/anxiety/mood disorder and at least try something else to help with that. Once your mental health is in more control, you'll feel immeasurably better in jig time. There are options, including finding another medical team who will take a fresh look at you. Your current team sounds.............tired.
Apart from that, the trigeminy might be a sign of things to come if it changes, and you suspect as much. Its symptoms, the way it makes you feel, is arousing your FoF response, and if it becomes chronic, or sustained, it leads to other problems due to the increased cortisol. I would recommend that you seek out a highly sought, and busy, electrophysiologist and have a consultation, ideally with a copy of that EKG in hand.