I have no explanations or the slightest inkling as to what might have gone wrong. I am scheduling the test again in 2 days. I have exhausted all material and I will get busier with time. I do not want to lose touch with GMAT. God knows what would happen then!
I assume you are a non native speaker. You have got magnificent practice scores but put aside the past performance. Gmat SC has changed for good and there are two grammatically choices now ( I am sure you are well aware of this by now ). Perhaps RC and SC might have taken a toll. Am curious to know what materials you used to grab concepts for SC and RC apart from OG's.
All the best for the next encounter . Calmness on test day definitely counts !
Am i worth a Kudo ? Life's around GMAT for the Moment