GMAT Strategy

Hi, I'm new to the forum. I wish I had known about this forum earlier on my "preparation".
I had my GMAT exam 3 days ago and it was: oh so bad!
I got the worst possible grade, even worse than I imagined, I'm shocked it could go so wrong.
When the test started I forgot everything I studied, I was more preoccupied about the time I had left than making a good process to answer the questions correctly (quantitative); and in verbal, I had to guess the last 7 questions, because I was running out of time!! Terrible.
Now, it's like I'm back at the beginning, the approach I made two months ago with my studying was obviously wrong.
I have to start all over again, but this time I would like to ask you guys where to start (?)!!! The truth is that I had it very difficult since I have a Fashion Design background and hadn't used my math skills for over 6 years since I finished high school. So it has taken me a lot of work getting to familiarize again with math.
Where would someone that studied Fashion Design start their study plan for the GMAT??
I got a private tutor before, but he only taught me the basics of math so I could remember what it's all about, I remember, but now I need to start thinking of it like the GMAT guys do, so, where can I learn that??
Well I hope one of you is so kind to illustrate the way for me, because as of now, I feel like a total ignorant of this exam!
Thanks!

There are various posts here asking help for chalking out a prep plan. Just search for them. If you have already taken the GMAT once, you should have a fair idea about which are your strong and weak areas. Attack the weak areas first.

It sounds like you didnt do the critical thing with respect to GMAT. Practice practice practice. Timing on the test is an art.

Sorry to hear about your score, but at least you have found some salvation

I agree. The key to doing well on the GMAT is organization, planning, and practice. Just pick a plan and stick to it and you'll definitely do better next time!