General GMAT Questions and Strategies | First GMAT Practice Exam Score 600

Hello everyone,

I have just taken the first official GMAT practice exam and scored horribly.
I scored 600 (V26,Q47) and I struggled through almost all of the questions. Some of the questions felt like I had never seen them before and I did not have a good time management strategy. The 5 minute remaining timer showed up when I was on the 26th question in Verbal and on the 28th question in Quant.
I have followed TTP thoroughly for my preparation and I was doing fine (scoring 60-70% in hard tests) in TTP.

I have already booked my exam for next week and I simply do not know what to do at this point. I cannot reschedule the exam and have to take it on the booked date.
Shall I do more practice tests? Try to work on verbal? Does it make sense to give the exam this close after a score like this?

Thanks in advance for any suggestions atall.