Some university lecturers enjoy overloading their students when there is no academic reason to do so, and they love seeing the de-motivating effect on their students. I know this because I have worked in that environment and seen how people do this to lighten up a boring job. Do you want those lecturers to win?
You must also remember that if you pass the course with the lowest pass score, you get the same qualification as the student who comes out on top. Use that to set your own expectations and ensure you do as much as you can rather than as much as is unreasonably expected of you.
I would say the first step is to start every day with an assessment of what needs to be done. Then first do what you need to do so that you can stay out of trouble and remove the biggest pressure for the day. Then, when you have time left, plan for tomorrow and again do what you need to do to stay out of trouble for the day. This will help you catch up and focus.
You will discover that you quickly learn to distinguish between the necessities and the stuff that you would like to do to perfection, and that you then focus on the necessities.
Here is also a way to rise above the anxiety and focus your mind: Find a spot on the wall opposite you and focus your eyes on the spot. As you do that, become aware of everything in the room around you - without moving your eyes from the spot. It does not matter if you feel your eyes start to water or you go cross-eyed. Just keep looking at the spot, and expand your awareness to cover the building you are in, and then further to cover the street, and further to cover the entire neighborhood.
Expand your awareness as far as you can, and then bring your attention back into the room. Then quickly write down a list of the things you have to do. You will find that your attention is focused, and that you know exactly where to place your priorities without feeling emotional about anything.