It really sounds like you're self-medicating depression and anxiety. (I realize you are also on actual medication for these two issues.) It feels to me like you need more proper support for those two conditions--maybe a different combo of meds, or someone to talk to, or a hobby you find more motivating than exercise to distract you from your workday.

I'd like to say change jobs if yours is literally driving you to drink, but I know that that is likely not an option. I'm guessing you're internalizing sone things about your work that you need to externalize. If you have anxieties about your performance that are honestly due to you underperforming, try to work on that so that you feel better about yourself and your contribution. But if you have anxieties that are due to factors that are largely or wholly outside your control, try to remember that it's not your sole job to make everything perfect. Practice "acting your wage" mentally. Don't give the job mental time that it is not paying you for.

(I know that last part is easier said than done. But it takes a kind of mental discipline. Unless you NEED to think about something for work in your off hours, tell yourself a firm "no" when you start to think about it, and forcibly find something else to think about. Even if you literally have to make something up. After a while it becomes more natural.)