UPDATE: This morning, for some reasons, I decided to boot up my pc, I first went to the BIOS. To my surprise, my HardDrive was showing up just like it did before! I even tried to boot up Windows...It worked perfectly! Like if nothing ever happened! I'm still trying to search my files atm to make sure nothing is missing. I'm very happy at the moment, but I find it strange that the day after the accident, it started to work normally. Perhaps the HDD is perfectly fine? I might be asking another question in this thread too,
How can I actually prevent any data loss? I've heard of people making Backups HDD but unfortunatly, I can't really spend on my PC right now.
Thank you for answering me too!