Where Does My Writer’s Block on Fiction Come From?

Writer’s block comes from having a former “friend” I blocked on Facebook, was making fun of a book cover. My writing supposedly had grammatical errors in it. I felt a block in fiction writing come up as soon as I wrote my first book under my name. I’m a touch embarrassed about the book content, so I’m tempted to republish under a pen name. I’m also trying to figure out other ways of using my BA in creative writing, a degree, which says I can handle criticism. But anyway, yes, the book is out there, and I have writer’s block in fiction, because I’m wary of staying up the whole night reading fiction in one shot. I have to take breaks, and make sure I do not stay up the whole night. I’m the sort of person who reads more than one book.