So I wanted to write a chapter of this book. Then the strangest,scariest and weird thing happened. . .

I'm not sure if anyone had this experience happen to them before but I took a screenshot of what happened

Can anyone explain how this happen? Is someone hacking my account?
Please tell me what I need to do

CharlieTheNekoSaiyan
DSP212
RoseMaria1987
KillerFrostCatlin
queenochaco
orgzsy
Corru-Kun
xXBCLoveXx
AnimeGirl27841
The_Anime_Fan
_-Angelic_Demon-_
R-i-t-i-k-a

Can someone help and spread this situation to other users please?