I am just so happy it's finally over and felt that I should share my experience here because I truly believe this forum is what made the biggest positive impact on my score.
I decided to apply for mba schools in May, 2018 and bought the GMAT books. I thought, hey, I'm an engineer.. I love math, this is a piece of cake. I started studying from the books (not timing myself, yikes), and 1 month in I did a mock exam and scored 630. Wasn't too happy with it but... it's just one month of work and I'm sure I'll do better next time. The next month is when I got bored... or lazy.. I felt the way I was studying wasn't really doing much so I took a two week break.. then did the second mock and scored a 640. I said, hey, I still have 1.5 months, I can get cracking and study more. This is when I started to look into working on the concepts I was weak in (probability, number identity, etc), I started learning them but it was hard to apply my knowledge since the GMAT book doesn't divide them by section. I met an mba applicant I got to know and she told me about this forum.. also told me GMAT is about strategy and to watch youtube videos about DS (which is where I was struggling the most). This was only two weeks before my exams so I started putting 8 hours of studying a day on top of my workload.
Exam day came, around mid august, I felt confident.
I scored a 640.
I was VERY bummed out.. I REALLY wanted to crack the high 600s. I felt a bit useless... the self doubt crept in.. but I spoke to universities in Europe (my target location) and almost all said to go for it and apply (I told them I'll be retaking the exam). I applied to universities and continued studying through this forum. I didn't do online courses or any course I had to pay for. I was stubborn and didn't want to. I had a two week vacation planned in early November.. 4.5 weeks before my exam... bad timing eh? Went on my vacation and came back and buckled down. Took a mock exam a week before my second official exam and scored a 700! I was now hopeful and felt that I can do it. One university from my top 2 picks said they'll get back to me the week of my gmat exam

that... freaked me out.. I heard from ESADE the day BEFORE my exam and my heart was beating so hard. But I got in to the MBA program! but the pressure was on since higher GMAT > potentially higher scholarship and that consulting career that's dangling in front of me.. everyone said a high GMAT would be more helpful than a 640 if you want to crack consulting.
Day of exam I was... calm? I think I've done all the studying I can make myself do. Went in the exam and started with Quant.. and man halfway through I was getting flustered because I felt I was doing badly... till the end.. I even said to myself, well, tough luck but I don't think I'm even scoring higher than 640. When I moved to verbal... I would sometimes zone out and think about how badly I bombed quant and had to snap myself back to what I was reading. Finished verbal and at that point I NEEDED to know my score.. went through IR... and then WA and by that point I was done with this exam. I wrote what I wanted to say for WA but I just didn't even have the mental energy to focus on it so I clicked next and that's when I got the biggest shock ever.
A 700.
I did NOT believe it.. this.. was my dream grade. I got a 48 on Quant (can't believe I thought I bombed it), and a 38 on Verbal. I am so happy and hard work truly pays off.
The GMAT was... such a huge part of the last 6 months of my life I now don't even know what to do with the extra time. I still have one university I'm waiting for an answer from but I already have a yes from one of my top 2 choices. I guess.. I want to be a bit sentimental and try to get closure and say this forum honestly was one of the reasons I am where I am. I also want to say nothing IS impossible even though I strongly believed I would never see that 700.
Thanks everyone and I hope everyone who's reading this will have a successful GMAT experience.
Sorry for the novella that I wrote.. I just felt I had to get it all out.
Feel free to PM me for any questions!