Before you think about rescheduling the exam i would suggest you to look back and see if
1. you have already given enough time to CR and RC
2. Have you practiced enough from the OG
3. Are you missing on any basic
I would suggest you to look into the above things and evaluate. If two out of three you have done then do not reschedule, otherwise reschedule the exam. But not by 10 days. go for around 15-20 days so that you can break down your prep in brushing/learning the basic concepts and practicing hard from OG only.
Else, go ahead and practice on accuracy rather than timing and learn to skip a few questions in between (CR preferably, since skipping RC means skipping the 3-4 questions together)
All the best!!
+1 Kudos if answer helps