Yes, yes it is.
But there is no twelve step program. The only way out is through. So write. Take the sentences out of your brain and put them on paper.
Agonizing over a sentence is called poetry; a related affliction, but more acute.
My spelling is horrid; and, I break rules of grammar for fun. But a good sentence, just one, when finally polished and buffed, is a joy.
The excellent wordsmiths here have been an inspiration to me as well. Upped my game, I like to believe.
The challenge is finding your voice.