Here are a few tips that have conquers my test anxiety:
Breathing techniques before starting the test. When I enter a room, I give myself enough time that I will be there for the while duration, so I can give myself time to use meditation to clear my mind if I get slammed with anxiety.
LOOK at what the question is asking me before I look at the appropriate answer. If it's a paper test, I highlight key words and scenarios. For example, Pt has new onset chest pain...if the question is asking me what action I must do, I'm looking for a nursing intervention. If it is asking to anticipate what a doctor is going to order, I'm looking for specific meds, lab work, etc. If its select all that apply (SATA), you are looking for facts of the scenario...like chest pain protocol...MONA comes to mind, and if that is the option, I'm selecting those options...people refer to SATA as the true/false questions.
When looking at test questions, I use guided imagery in the scenario. I think about if I am the nurse, what is going to be my best action.
Whenever I hear someone get up, I stop taking the test to continue concentrating, or go into meditation mode to prevent distraction and TAKE my TIME. It keeps me refreshed.
These tips I used in nursing school, to pass the NCLEX PN and RN the first time (can transfer easily to the computer testing) and for my math testing during orientation at my job....passed the math test with a 100!!! Shocked myself, lol.
Hope this helps....test anxiety is a monster that can be dealt with. Seek out help with your instructors...I've had a few of my instructors give me books or suggest recommended books hat I used to study from. They each helped me in test taking, and raised my test grades.