Reschedule (again)?

Hi,

I've been taking practice exams over the past month+ and my scores are nowhere where I want, ( 21,22, 27, and 24 respectively). I've been going back and thoroughly looking at my mistakes for each exam. The first two had content issues and I went back and worked on. I saw a small improvement, but now I've noticed that just about ALL of my mistakes have been from an accumulation of small mistakes including misreading/missing info, along with a bit of test anxiety.

I've recently been working on subject tests individually, along with mixing up passages from full lengths that I made mistakes on, and have been noticing good scores, i.e. (11+).

My exam is now 4 days away. I already rescheduled once, and it seems as if it is looking like I might want to cancel my exam and just sign up for later in the summer. Am I over thinking this (as usual it seems)/paranoid? Or is this something that I can overcome and just have to suck it up and see how it goes?

Btw my target score is 30+.

Thanks