Experiencing intense anxiety when at work

Hi this is my first post here. I’ve been previously diagnosed with GAD and Major Depressive Disorder; Recently I’ve been experiencing intense anxiety while at work. I feel as if people such as supervisors and coworkers are watching me work and this causes anxiety/tension. I feel like I have to not mess up and this causes me to feel like I lock up, when I try to ignore the anxiety I feel it just makes it worse and I feel like I can tell they know I’m acting differently which makes it worse.

It causes me to self isolate to feel better; This doesn’t happen all the time but recently it has kicked up again and I’m afraid to tell my doctor because I’m afraid he will tell me I’m paranoid or something. Idk if it’s just me worrying too much and my mind just building on the worry creating the anxiety. I’m finding it hard to interact with people as my social anxiety recently has skyrocketed

Any thoughts if stress at work could be causing me to become paranoid or does this just sound like excessive worry? I see my dr in a week but am having a hard time bringing it up to him.