do not loose your confidence
Avoid benchmarking your preparation ( and readiness for SCJP exam) against your score in Examlab mock exams.
Examlabs are a bit difficult but as mentioned earlier make sure you understand the underlying concept that each question has. Try Master exam that comes up in CD with SCJP 5 guide.
Oracle Java Web Service Developer (1z0-897), Oracle certified Java 7 Programmer, SCJA 1.0, SCJP 5.0, SCWCD 5.0, Oracle SQL Fundamentals I