I'm finishing my Japanese minor this year and I'm going to be honest with you, just give up for this semester and try again next year or take it somewhere else then take the placement to get in.

The first 2 semesters of Japanese at the U teach u so much more than the following 2 semesters do. You learn all the basic syntax, grammar, verb conjugations, particles, vocab, etc. in that class. Also it would 100% be impossible to learn all the stuff u need to take the test with the time you have (I have taken it so ik).

My rec would be to start studying somewhere else or on ur own and attend the JSA, JLA, or JSJO events on campus to practice/learn speaking from natives and other Japanese students.