Nursing program

I'm supposed to take a teas test in a few days to get into a nursing program. I took the practice test and I was soooo LOST on the math and some of the science questions. I thought they would teach us this stuff instead of me already having to know it to enter the program. Now I feel extra stupid and so discouraged. Has anyone taken the test before? Are there any tips you could give me? I just don't want to pay $80 to go make an ass of myself but nursing is my dream career