Himai dont be worried you are smart you are going to pass the exam for sure.
You want to learn web services well ?
study well Java Web Service Up and Running, write every example and
test, read every kind of specification oasis w3c ws-i
You want to pass the exam ?
just read Java Web Service Up and Running, test the things you learn a couple of time
grab MZ notes, epractize lab, ucertify, test self engin stuck in your head all the question dont worry if you dont undestand and in 3 weeks you pass the exam for sure
Davide