All my chats were gone, and I couldn't write to any of my friends. "Okay, I will just reach the tech support, and solve the problem" - silly me back then. I was genuinely shocked that there was no "Facebook support". Just a bunch of FAQs, general help, and that's it, no way to talk to anyone. I felt completely helpless and lost, really unpleasant feeling.
My account got back to normal after one day or so, but that was the day I decided to begin the process of leaving that platform.