Your situation is different from mine but you're not alone. The isolation, the health anxiety, the lethargy, many of us have felt it too. There just comes a point where you figure out the pattern because I honestly believe that there is a way out, although even I haven't found it yet. I isolated myself for a long time thinking it was what I needed. Before isolation I was depressed, but at least I had friends, socialized, had unpredictable days... Every human is the same in what it needs for optimal survival and socializing and being around other people is just a part of that nature. After isolation I came out of it literally shaking when I had to talk to people. Even if it was just a text, my teeth would start chattering, my body would go into shivers, and my heart rate would greatly increase. My thoughts were scattered and I ended up making my problems worse because since then I've developed severe social anxiety. And although casual conversations still make my heart race, I find myself getting better. I find myself looking for opportunities to try again. The only real suggestion I could give you is to train and condition yourself. People fall into habits, right? We run on routines. The morning routine (waking up, eating breakfast, showering, brushing our teeth), the night routine, the lunch routine, etc. What you need to do now is slowly break out of the routine and just add something new to your schedule until you make it a part of your routine. Whether its going for a walk even inside your house (walking up and down the stairs), or reading a chapter or two of something uplifting. Maybe you've been very depressed since the fainting/seizure episode because ever since then the fear you had from that experience altered what you believed you can/or cannot do. Honestly you brainwashed yourself into the fear, and now you need to at least to try to brainwash yourself to believing you are capable, you are strong, you are brave, you are healthy, you are active. The placebo effect will kick in and you'll become all of those. Good luck in your journey.