When casually speaking English I use the word "actually" a lot at the beginning of a sentance, or as part of the flow of my speech. e.g.
Actually, next semester doesn't start for a month.
Actually, I don't have any siblings.
I would like to be able to continue this speech habit in Mandarin Chinese, I have been using 事实上 (shìshíshàng), but from my listeners' reactions I am not sure if this is really the same.
What is the closest equivalent expression?