What shoud I do from hereon?

So, I've been preparing for the GMAT for the last six months. Since, my maths skills were pathetic initially, I had to practice a lot over the last few months before I could start getting a good grasp on many quant concepts. In fact, my entire preparation has been around quant. Now, I need to take the GMAT as soon as possible for two reasons: 1) I'm terribly exhausted and 2) The deadlines for masters programs in the UK are due in a month or so and I must get done with the GMAT to prepare other parts of my application.

Right now, I'm working on verbal. I'm using OG to solve questions. The thing is that I'm not sure whether I need to do all the OG quant questions as well. Given I've been preparing for quant for almost entire six month, do I need to solve all the OG questions now to be sure about myself? My goal score is 700+. I would rather be on the safer side of the aisle, but as I said, I'm totally exhausted and deadlines are coming near. I gotta take the GMAT soon. It won't take more than a week to do all the OG quant questions, which are 460 in number, but the question is that given six months of quant prep, do I really need to do them?

Respected experts, please give your honest word on my query. It will really help! Thanks.