Well, I speak from experience, and as a test taker who 'has attempted in such madness', I believe I am in a position to advise on whether you should do this or not - DON'T.
Pardon my straight answer.
Ok...I'm going to be doing some hard talking (hard typing???) here. So, if you are someone with soft sensibilities, then I apologize in advance and suggest that you refrain from reading further.
I just get the feeling that you are in the same position as I was in when I took my first GMAT (I scored a 680 with a 5 day preparation btw).Before you form any misconceptions, let me tell you I'm not recommending against a week's preparation for the obvious reasons. My opinions are solely based on your post.

You might even end up getting a 700+ with this effort, but I can assure you that it is not your true potential. You will be capable of achieving a higher score if you put in a concerted effort and actually understand the uniqueness and flavor of the GMAT.
I am ready to study all day
Don't do that. Contrary to all the textbook cramming that has been inculcated in us since school days, this method is highly unproductive for a unique test like the GMAT. I don't intend to come off as a fanboi, but it would do you good to show the test the respect it deserves.
This post by Ron Purewal (disclaimer - I'm a huge Ron fan btw) explains it all.
https://www.beatthegmat.com/550-to-720-i ... tml#330724
Best approach for preparing (I have started looking at the Self Study > 2 week plan as starting point for establishing my plan)
Evidently, you have not planned and accounted for the test, and are mentally unprepared. It's extremely tough to get into the 'zone' and peak on test day on such short notice. Normally, I would give it a month (at the least) from this stage.
I've been wanting to take the GMAT for a while, but working full time and having a pretty busy schedule, I found it difficult to invest time to prepare for the GMAT (without it taking forever). So I have resolved to taking one week off (+2 weekends = 9days) to prepare for the exam, and take it the Monday right after. I am ready to study all day, but am unsure if:
Your post doesn't mention some basic details like what your target schools are, what your target GMAT score is. You haven't mentioned if you've taken a diagnostic GMAT Prep. We don't have a clue about what your current GMAT score level is. Have you booked your test date yet? Are you confident you'll get a slot for 'the Monday right after'? If you haven't taken a mock GMAT previously, are you confident you are currently in shape and strength to stay focused and at the top of your game for
four hours? Phew! that's a lot of questions
It's your post on a public forum, and you are entitled to your thought processes, but I'm going to go out on a limb here and assume that you haven't really given much thought about the prep process and the actual test. It's no big deal. It's pretty common for a first time test taker (especially for Indians, who take the national level CAT exam in the same way). I was in exactly the same position when I gave my first attempt. I'm just saying that with the right attitude, mindset and preparation time, you can achieve a 30-50 point increase from what you would currently get.
An MBA is a huge investment. I'm sure all of us empathize with you about having a busy schedule, but I'm sorry, there just isn't another way out. If this little investment on time, effort, energy, maybe even loss of sleep and socializing, can lead to thousands of dollars saved in scholarships and opportunities to get into better schools, then I think it's a cost worth paying for. After all, an MBA / post MBA life is all about taking tough decisions, planning and prioritization...Don't you think?
Please take a diagnostic GMAT Prep including the essays. Let us know your scores along with the split.
Or, you can go ahead and take the real test. All the best!!!
Cheers!
PS - I took the test the second time, with the right mentality and again, a 20 day preparation time. I had a tough work schedule and didn't get leaves. And yes, I contemplated postponing and rescheduling several times during my preparation.

I ended up with a 730. Again, not my best shot I would say, but I think my effort-result payoff ratio was quite decent.