Yes you do sound overwhelmed with worry. Do you know of the measures you can take to help you do your best on a test? Which of them do you plan on doing?
I'm talking about things like listening to classical music (not only while you study, but the morning before the testing.) NOT cramming the night before the test, because you won't really gain anything from that...but rest well, get a good night's sleep knowing you have studied hard and know plenty more now than you did the other times.

Your tutors know how to take the test...be sure you take their advice too. Good WIshes! What score do you want from the test?