autism and trouble writing

Im still not sure if I have autism or not (still waiting for my appointment) but I was wondering if having trouble writing texts is a autism trait or not, since one of the traits of autism is trouble with communication. Ever since I can remember, writing has been incredibly hard for me. It wasn’t the calligraphy or the grammar that bothered but the actual content of the text. Sometimes no matter how hard I try, I just can’t think of anything to write. In school, it would take me days to write a single essay that I was supposed to write in a few hours.

In order to effectively write something, I need a very specific structure for the text (that I must use every time). It makes it a lot less creative but It was the way I found.