I'd say that there completely up for grabs, as we really don't know much about her, and I think that those are fairly minor details that Harry wouldn't care about as the books are from his point of view. Anything realistic would work, I think!
Edit: This is a response to Weasley Mom




Reply With Quote

). As to whether Harry was early or late, I think it's up to however you want to write it. 
I jest. (a little) Yes, I'm well acquainted with the symptoms as I was quite sick during the first trimester both times. That said, I wondered if end of Oct was too early to imagine Lily having the earliest symptoms? But if Harry was, say, three weeks late, I could see her having some queasiness at the end of Oct. Maybe? 



