I know what you mean, but you have a week to go so there is plenty time for revision yet. I booked mine a week and a half before and managed to pass, im by no means academic and have been out of school for some 11 years so im sure you will do fine!
I tried that website too, the ball test was fairly similar (minus the traction changes) but the rest of the stuff isnt on the cabair test. Seriously though id reccomend the pilapt-prep website if you are looking for all round preparation, it only cost £20 and was money well spent in my opinion.
As for the electromagnatism questions, i used bbc bitesize(Scotland, standard grade level) and it gave fairly good coverage of the subject.
best of luck!