Will taking anxiety medicine help me be able to work at my job better?

I recently got a job and been working for about 4 months now, and one of the problems I’ve been having since then is anxiety. It has pretty much gotten difficult for me to enjoy my day away from work or to sleep. I have found it almost impossible for me to not think about my job and to be able to relax when I’m away. I’m always worrying about what’s to come. I’m really getting tired of it.
At work I’m in constant fear of getting into trouble, messing up, not finishing enough orders, forgetting something in an order, or asking stupid questions. And the more and more that I worry about it the more often I forget things and almost mess up, but I catch myself.
I’ve gone as far as buying myself a treadmill, changing my eating habits, and even practicing on my breathing..but none of it is helping. I’m becoming desperate, if anyone knows anything about anxiety medicine and how it works, would it work for me and help me be able to work at my job more comfortably?