Im diagnosed with gad. I have had anxiety centering around work since i started working- it could be any job. I worked in a kitchen for years and had lots of bad experiences there. I was there for over three years and even after three long years of working there I had anxiety before work as if it was my first day. I’m at a new job now and I literally cannot calm down the night before. I try everything meditation, breathing, etc. I am of course anxious about the possibilities that the next day can hold like will I mess up, will someone be argumentative with me, you know, the stuff anxiety makes you spiral about. Im medicated and try so hard to stay calm. I cry at night because im so worried and anxious. I dont really sleep. The next morning im shaking on my way to work and its for no reason. I like my coworkers, im catching onto my new job well... I just cant take it anymore. Does anyone relate? Its exhausting and makes me sad. 
Ive lived with anxiety most of my life and it makes everything so fucking hard. I try to alleviate it and rationalize my thoughts, but i dont know why i have such bad anxiety centered around work since i started working as a teenager