First, welcome.
No, you aren't alone in this, for sure. I admit to the same difficulty. Historicly, I usually last about two years in a given job (on average). I see the inevitable pattern each time, I start to miss time, the effort to avoid missing any more causes more problems, and I eventually leave (or in a couple of cases get let go) since I can't handle it anymore at that time.
I know how hard that is. As it happens I am very close to quitting my job. I'm getting more and more confrontational at work, and that is just not me. Suffice it to say I am having some issues with a couple of co-workers and the anxiety is really getting to me.
I wish I could suggest a solution. If you find one, send it my way will ya? lol
But seriously, my only advice is to get what ever treatment you find effective. If your current treatment is not working, seek an alternative through your doctor. That's about all you can do. Well, that and practice techniques for reducing stress. I have a lot of trouble practicing what I preach, though, so please consider this advice in the spirit it is intended. I'm not doing any better, I just hope you can find it helpful.
When you have those days when then entire world seems to be covered in pitfalls, looking to trip you up at every step, you can either choose not to take a step, or you can tread carefully and find your way. It's hard, I know, because you don't know what will happen, but I'd like to think it can be done. Some days, I feel so hyper, all nervous energy with no focus, and some how when I get to work, that's all converted into tension, anxiety, and agression. But other days, I manage to find "my happy place" lol and it doesn't seems so bad.