I been through that, I no longer get that. I used to hear kill yourself all the time and dream about me dying nightly. I no longer get that. You might need behavioral therapy to get rid of the fear. Seems to me you made it a thing that it's about work. So now everytime you're at work you feel it. Your body got used to reminding you about it. You probably associated the thoughts with stressed and somehow you are scared you will lose control due to the stress. You also said you think it's going to get worse, which means you are already working up an association of a degrading condition. So now not only are you reminding yourself to worry at work, but to worry about worrying and to worry that you will worry in the future. Soon you might not only worry that its going to get worse, you might start to worry that you're going crazy or that you don't have a choice. Because that's how fear works. So you have to dissasociate those things. You need to learn thought stopping but you also have to understand that those things have nothing to do with eachother. Why? Because if all you learn is thought stopping and you do not disassociate those things you will be thought stopping all day everyday. Do you get it? You have to literally, acknowledge that those thoughts at the most basic level 1) they are just thoughts 2) they are just images 3) they are just words. Nothing more Nothing less. You need to stop giving meaning to things and at the same time you need to stop thoughts. Remember you need both.