I may not have answers to all your questions but what I've learned is that 90% of the time I don't play my best when I'm working 24/7 at chess. It may be worth reconsidering your training plan right before a tournament.
I also think the fact that you won't be able to play any tournaments for the next two months is good for you. Analyze the games you lost, take a break if needed and hopefully you'll come back with a much better performance.
Thank you for answering. Yes, I'll change my training plan before tournaments. Do you mean I should take a break from playing or even working on chess? I really feel like I want to work extremely hard on my chess so that the day I play I'll prove that I'm better than that, but maybe I should stop practicing for a while as well
I had easter break from school for 2 weeks. I spent the first week training 24/7. I was expecting to play my best chess and wanted to gain some rating to approach 2200 FIDE. The second week I played in the French under 18 championship. And I played TERRIBLY. I lost to an 1800 first. I didn't mind much because it happens I guess, but then the second defeat against another 1800 devastated me. I then lost game after game after game. Losing to more 1800's even a 1600! Last round I lost to a 1500. I played so badly. I missed obvious moves by my opponents, took so long to see basic tactics and threw easily winning positions up material.
I'm going to lose 200 rating. I don't think I'll play much because of school in the next 2 months. How do I recover from the trauma of that tournament? I can't think clearly doing anything now since the memories of missed wins and blunders keep coming back. And I started doubting my level of chess. Did I lose my level? Maybe I was overrated and just got lucky in the past? How do I recover psychologically?